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Cf. (a) Creighton, T. E. Proteins: Structure and Molecular Properties; Freeman: New York, 1983. (b) Rizo, J.; Gierasch, L. Annu. Rev. Biochem. 1992, 61, 387. (c) Rose, G. D.; Gierasch, L. M.; Smith, J. A. Adv. Protein Chem. 1985, 37, 1. (d) Ferguson, M. D.; Meara, J. P.; Nakanishi, H.; Lee, M. S.; Kahn, M. Tetrahedron Lett. 1997, 38, 6961 and references cited therein.
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One of the earliest examples of the turn-forming ability of N-acyl proline dipeptides composed of amino acids of opposite configurations ("heterochiral sequences") may be found in the structure of gramicidin: Hull, S. E.; Karlsson, R.; Main, P.; Woolfson, M. M.; Dodson, E. J. Nature 1978, 275, 206. An excellent discussion of the turn-forming ability of heterochiral sequences appears in ref 3c, p 22 ff. a
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0028587717
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Alternative techniques used to stabilize turns may include formation of disulfide bridges (cf. Quinn, T. P.; Tweedy, N. B.; Williams, R. W.; Richardson, J. S.; Richardson, D. C. Proc. Natl. Acad. Sci. U.S.A. 1994, 91, 8747) or metal ligation (cf. Handel, T. M.; Williams, S. A.; DeGrado, W. F. Science 1993, 261, 879). In extreme cases, a rigid scaffolding resembling the environment of turns has been used to enforce a desired conformation: e.g., Kim, K.; Germanas, J. P. J. Org. Chem. 1997, 62, 2847, 2853. Lombart, H. G.; Lubell, W. D. J. Org. Chem. 1996, 61, 9437.
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Richardson, J.S.4
Richardson, D.C.5
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11
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0027177971
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Alternative techniques used to stabilize turns may include formation of disulfide bridges (cf. Quinn, T. P.; Tweedy, N. B.; Williams, R. W.; Richardson, J. S.; Richardson, D. C. Proc. Natl. Acad. Sci. U.S.A. 1994, 91, 8747) or metal ligation (cf. Handel, T. M.; Williams, S. A.; DeGrado, W. F. Science 1993, 261, 879). In extreme cases, a rigid scaffolding resembling the environment of turns has been used to enforce a desired conformation: e.g., Kim, K.; Germanas, J. P. J. Org. Chem. 1997, 62, 2847, 2853. Lombart, H. G.; Lubell, W. D. J. Org. Chem. 1996, 61, 9437.
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Handel, T.M.1
Williams, S.A.2
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0030958399
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Alternative techniques used to stabilize turns may include formation of disulfide bridges (cf. Quinn, T. P.; Tweedy, N. B.; Williams, R. W.; Richardson, J. S.; Richardson, D. C. Proc. Natl. Acad. Sci. U.S.A. 1994, 91, 8747) or metal ligation (cf. Handel, T. M.; Williams, S. A.; DeGrado, W. F. Science 1993, 261, 879). In extreme cases, a rigid scaffolding resembling the environment of turns has been used to enforce a desired conformation: e.g., Kim, K.; Germanas, J. P. J. Org. Chem. 1997, 62, 2847, 2853. Lombart, H. G.; Lubell, W. D. J. Org. Chem. 1996, 61, 9437.
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Kim, K.1
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13
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0030446803
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Alternative techniques used to stabilize turns may include formation of disulfide bridges (cf. Quinn, T. P.; Tweedy, N. B.; Williams, R. W.; Richardson, J. S.; Richardson, D. C. Proc. Natl. Acad. Sci. U.S.A. 1994, 91, 8747) or metal ligation (cf. Handel, T. M.; Williams, S. A.; DeGrado, W. F. Science 1993, 261, 879). In extreme cases, a rigid scaffolding resembling the environment of turns has been used to enforce a desired conformation: e.g., Kim, K.; Germanas, J. P. J. Org. Chem. 1997, 62, 2847, 2853. Lombart, H. G.; Lubell, W. D. J. Org. Chem. 1996, 61, 9437.
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Luzopeptins: (a) Konishi, M.; Ohkuma, H.; Sakai, F.; Tsuno, T.; Koshiyama, H.; Naito, T.; Kawaguchi, H. J. Am. Chem. Soc. 1981, 103, 1241. (b) Arnold, E.; Clardy, J. J. Am. Chem. Soc. 1981, 103, 1243 and references therein. Quinoxapeptins: (c) Lingham, R. B.; Hsu, A. H. M.; O'Brien, J. A.; Sigmund, J. M.; Sanchez, M.; Gagliardi, M. M.; Heimbuch, B. K.; Genilloud, O.; Martin, I.; Diez, M. T.; Hirsch, C. F.; Zink, D. L.; Liesch, J. M.; Koch, G. E.; Gartner, S. E.; Garrity, G. M.; Tsou, N. N.; Salituro, G. M. J. Antibiot. 1996, 49, 253. We propose the convenient descriptor "peptins" to refer to the entire class of these antibiotics.
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Konishi, M.1
Ohkuma, H.2
Sakai, F.3
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Koshiyama, H.5
Naito, T.6
Kawaguchi, H.7
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17
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0019457091
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and references therein
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Luzopeptins: (a) Konishi, M.; Ohkuma, H.; Sakai, F.; Tsuno, T.; Koshiyama, H.; Naito, T.; Kawaguchi, H. J. Am. Chem. Soc. 1981, 103, 1241. (b) Arnold, E.; Clardy, J. J. Am. Chem. Soc. 1981, 103, 1243 and references therein. Quinoxapeptins: (c) Lingham, R. B.; Hsu, A. H. M.; O'Brien, J. A.; Sigmund, J. M.; Sanchez, M.; Gagliardi, M. M.; Heimbuch, B. K.; Genilloud, O.; Martin, I.; Diez, M. T.; Hirsch, C. F.; Zink, D. L.; Liesch, J. M.; Koch, G. E.; Gartner, S. E.; Garrity, G. M.; Tsou, N. N.; Salituro, G. M. J. Antibiot. 1996, 49, 253. We propose the convenient descriptor "peptins" to refer to the entire class of these antibiotics.
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J. Am. Chem. Soc.
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Arnold, E.1
Clardy, J.2
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18
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0029983711
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Luzopeptins: (a) Konishi, M.; Ohkuma, H.; Sakai, F.; Tsuno, T.; Koshiyama, H.; Naito, T.; Kawaguchi, H. J. Am. Chem. Soc. 1981, 103, 1241. (b) Arnold, E.; Clardy, J. J. Am. Chem. Soc. 1981, 103, 1243 and references therein. Quinoxapeptins: (c) Lingham, R. B.; Hsu, A. H. M.; O'Brien, J. A.; Sigmund, J. M.; Sanchez, M.; Gagliardi, M. M.; Heimbuch, B. K.; Genilloud, O.; Martin, I.; Diez, M. T.; Hirsch, C. F.; Zink, D. L.; Liesch, J. M.; Koch, G. E.; Gartner, S. E.; Garrity, G. M.; Tsou, N. N.; Salituro, G. M. J. Antibiot. 1996, 49, 253. We propose the convenient descriptor "peptins" to refer to the entire class of these antibiotics.
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J. Antibiot.
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Lingham, R.B.1
Hsu, A.H.M.2
O'Brien, J.A.3
Sigmund, J.M.4
Sanchez, M.5
Gagliardi, M.M.6
Heimbuch, B.K.7
Genilloud, O.8
Martin, I.9
Diez, M.T.10
Hirsch, C.F.11
Zink, D.L.12
Liesch, J.M.13
Koch, G.E.14
Gartner, S.E.15
Garrity, G.M.16
Tsou, N.N.17
Salituro, G.M.18
-
19
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-
0000500748
-
-
Wiley: New York, Collect
-
Compound 4 was obtained by Schreiber ozonolysis of cyclopentene to methyl 5-oxopentanoate (Claus, R. E.; Schreiber, S. L. Organic Syntheses; Wiley: New York, 1990; Collect. Vol. VII, p 168) followed by ketalization, hydrolysis, and coupling to the Evans auxiliary. Relevant references for key steps: (step a) Gennari, C.; Colombo, L.; Bertolini, G. J. Am. Chem. Soc. 1986, 108, 6394. Evans, D. A.; Britton, T. C.; Dorow, R. L.; Dellaria, J. F. J. Am. Chem. Soc. 1986, 108, 6395. Trimble, L. A.; Vederas, J. C. J. Am. Chem. Soc. 1986, 108, 6397. (Step b) Evans, D. A.; Britton, T. C.; Dorow, R. L.; Dellaria, J. F. Tetrahedron 1988, 44, 5525. (Steps c and d) see refs 7 and 10. (Steps g and h) Ishizuka, T.; Kunieda, T. Tetrahedron Lett. 1987, 28, 4185.
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(1990)
Organic Syntheses
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, pp. 168
-
-
Claus, R.E.1
Schreiber, S.L.2
-
20
-
-
0000811532
-
-
Compound 4 was obtained by Schreiber ozonolysis of cyclopentene to methyl 5-oxopentanoate (Claus, R. E.; Schreiber, S. L. Organic Syntheses; Wiley: New York, 1990; Collect. Vol. VII, p 168) followed by ketalization, hydrolysis, and coupling to the Evans auxiliary. Relevant references for key steps: (step a) Gennari, C.; Colombo, L.; Bertolini, G. J. Am. Chem. Soc. 1986, 108, 6394. Evans, D. A.; Britton, T. C.; Dorow, R. L.; Dellaria, J. F. J. Am. Chem. Soc. 1986, 108, 6395. Trimble, L. A.; Vederas, J. C. J. Am. Chem. Soc. 1986, 108, 6397. (Step b) Evans, D. A.; Britton, T. C.; Dorow, R. L.; Dellaria, J. F. Tetrahedron 1988, 44, 5525. (Steps c and d) see refs 7 and 10. (Steps g and h) Ishizuka, T.; Kunieda, T. Tetrahedron Lett. 1987, 28, 4185.
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J. Am. Chem. Soc.
, vol.108
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Gennari, C.1
Colombo, L.2
Bertolini, G.3
-
21
-
-
33845375340
-
-
Compound 4 was obtained by Schreiber ozonolysis of cyclopentene to methyl 5-oxopentanoate (Claus, R. E.; Schreiber, S. L. Organic Syntheses; Wiley: New York, 1990; Collect. Vol. VII, p 168) followed by ketalization, hydrolysis, and coupling to the Evans auxiliary. Relevant references for key steps: (step a) Gennari, C.; Colombo, L.; Bertolini, G. J. Am. Chem. Soc. 1986, 108, 6394. Evans, D. A.; Britton, T. C.; Dorow, R. L.; Dellaria, J. F. J. Am. Chem. Soc. 1986, 108, 6395. Trimble, L. A.; Vederas, J. C. J. Am. Chem. Soc. 1986, 108, 6397. (Step b) Evans, D. A.; Britton, T. C.; Dorow, R. L.; Dellaria, J. F. Tetrahedron 1988, 44, 5525. (Steps c and d) see refs 7 and 10. (Steps g and h) Ishizuka, T.; Kunieda, T. Tetrahedron Lett. 1987, 28, 4185.
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, vol.108
, pp. 6395
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-
Evans, D.A.1
Britton, T.C.2
Dorow, R.L.3
Dellaria, J.F.4
-
22
-
-
0000925727
-
-
Compound 4 was obtained by Schreiber ozonolysis of cyclopentene to methyl 5-oxopentanoate (Claus, R. E.; Schreiber, S. L. Organic Syntheses; Wiley: New York, 1990; Collect. Vol. VII, p 168) followed by ketalization, hydrolysis, and coupling to the Evans auxiliary. Relevant references for key steps: (step a) Gennari, C.; Colombo, L.; Bertolini, G. J. Am. Chem. Soc. 1986, 108, 6394. Evans, D. A.; Britton, T. C.; Dorow, R. L.; Dellaria, J. F. J. Am. Chem. Soc. 1986, 108, 6395. Trimble, L. A.; Vederas, J. C. J. Am. Chem. Soc. 1986, 108, 6397. (Step b) Evans, D. A.; Britton, T. C.; Dorow, R. L.; Dellaria, J. F. Tetrahedron 1988, 44, 5525. (Steps c and d) see refs 7 and 10. (Steps g and h) Ishizuka, T.; Kunieda, T. Tetrahedron Lett. 1987, 28, 4185.
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J. Am. Chem. Soc.
, vol.108
, pp. 6397
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-
Trimble, L.A.1
Vederas, J.C.2
-
23
-
-
0000744779
-
-
Compound 4 was obtained by Schreiber ozonolysis of cyclopentene to methyl 5-oxopentanoate (Claus, R. E.; Schreiber, S. L. Organic Syntheses; Wiley: New York, 1990; Collect. Vol. VII, p 168) followed by ketalization, hydrolysis, and coupling to the Evans auxiliary. Relevant references for key steps: (step a) Gennari, C.; Colombo, L.; Bertolini, G. J. Am. Chem. Soc. 1986, 108, 6394. Evans, D. A.; Britton, T. C.; Dorow, R. L.; Dellaria, J. F. J. Am. Chem. Soc. 1986, 108, 6395. Trimble, L. A.; Vederas, J. C. J. Am. Chem. Soc. 1986, 108, 6397. (Step b) Evans, D. A.; Britton, T. C.; Dorow, R. L.; Dellaria, J. F. Tetrahedron 1988, 44, 5525. (Steps c and d) see refs 7 and 10. (Steps g and h) Ishizuka, T.; Kunieda, T. Tetrahedron Lett. 1987, 28, 4185.
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, pp. 5525
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Evans, D.A.1
Britton, T.C.2
Dorow, R.L.3
Dellaria, J.F.4
-
24
-
-
0001021787
-
-
Compound 4 was obtained by Schreiber ozonolysis of cyclopentene to methyl 5-oxopentanoate (Claus, R. E.; Schreiber, S. L. Organic Syntheses; Wiley: New York, 1990; Collect. Vol. VII, p 168) followed by ketalization, hydrolysis, and coupling to the Evans auxiliary. Relevant references for key steps: (step a) Gennari, C.; Colombo, L.; Bertolini, G. J. Am. Chem. Soc. 1986, 108, 6394. Evans, D. A.; Britton, T. C.; Dorow, R. L.; Dellaria, J. F. J. Am. Chem. Soc. 1986, 108, 6395. Trimble, L. A.; Vederas, J. C. J. Am. Chem. Soc. 1986, 108, 6397. (Step b) Evans, D. A.; Britton, T. C.; Dorow, R. L.; Dellaria, J. F. Tetrahedron 1988, 44, 5525. (Steps c and d) see refs 7 and 10. (Steps g and h) Ishizuka, T.; Kunieda, T. Tetrahedron Lett. 1987, 28, 4185.
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Tetrahedron Lett.
, vol.28
, pp. 4185
-
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Ishizuka, T.1
Kunieda, T.2
-
26
-
-
6844237399
-
-
note
-
+ calculations are of qualitative, rather than quantitative, significance. We relied primarily on PM3 semiempirical methods, because this technique seems to reproduce experimental conformational population ratios rather well.
-
-
-
-
27
-
-
6844240598
-
-
note
-
Repulsive forces are not as strong in PM3, a reparametrized form of AM1, as they are in other semiempirical methods (Hyperchem literature and manuals). Therefore the conformational energy differences calculated by this method are likely to represent lower-end estimates.
-
-
-
-
28
-
-
84970558550
-
-
Blount, J. F.; Dunlop, R. W.; Erickson, K. L.; Wells, R. J. Aust. J. Chem. 1982, 35, 5, 145.
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Erickson, K.L.3
Wells, R.J.4
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29
-
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6844260904
-
-
note
-
We are grateful to one of the reviewers for kindly bringing to our attention the work cited in refs 13, 17, and 20.
-
-
-
-
30
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37049113043
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(a) Davies, D. B.; Abu Khaled, M.; Urry, D. W. J. Chem. Soc., Perkin Trans. 2 1977, 1294.
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(b) Hosur, R. V.; Ernst, R. R.; Wüthrich, K. J. Magn. Reson. 1983, 54, 142.
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36
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0025008048
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Bock, M. G.; DiPardo, R. M.; Williams, P. D.; Pettibone, D. J.; Clineschmidt, B. V.; Ball, R. G.; Veber, D. F.; Freidiger, R. M. J. Med. Chem. 1990, 33, 2321.
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Clineschmidt, B.V.5
Ball, R.G.6
Veber, D.F.7
Freidiger, R.M.8
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37
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6844252010
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For a discussion of the ability of depsipeptides to establish turn motifs, see: Haque, T. S.; Little, J. C.; Gellman, S. H. J. Am. Chem. Soc. 1996, 218, 6915.
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Haque, T.S.1
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Gellman, S.H.3
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39
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33845282074
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Results of more sophisticated ab initio calculations concerning charge distribution and rotational barriers in various carbonyl compounds may be found in the following: (a) Wiberg, K. B.; Laidig, K. E. J. Am. Chem. Soc. 1987, 109, 5935. (b) Laidig, K. E.; Cameron, L. M. Can. J. Chem. 1993, 71, 872. These methods may permit calculation of rotational barriers in PCA peptides; however, we have not yet carried out such studies.
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Wiberg, K.B.1
Laidig, K.E.2
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40
-
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33845282074
-
-
Results of more sophisticated ab initio calculations concerning charge distribution and rotational barriers in various carbonyl compounds may be found in the following: (a) Wiberg, K. B.; Laidig, K. E. J. Am. Chem. Soc. 1987, 109, 5935. (b) Laidig, K. E.; Cameron, L. M. Can. J. Chem. 1993, 71, 872. These methods may permit calculation of rotational barriers in PCA peptides; however, we have not yet carried out such studies.
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Laidig, K.E.1
Cameron, L.M.2
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41
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0030817559
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After the submission of this paper the preparation of the remarkable ring system 24 was described: Mish, M. R.; Guerra, F. M.; Carreira, E. M. J. Am. Chem. Soc. 1997, 119, 8379.
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Mish, M.R.1
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42
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6844260903
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note
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2.
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