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For synthetic studies of phytoalexin elicitors in soybeans, see: (a) Yamada, H.; Harada, T.; Takahashi, T. J. Am. Chem. Soc. 1994, 116, 7919-7920; (b) Yamada, H.; Takimoto, H.; Ikeda, T.; Tsukamoto, H.; Harada, T.; Takahashi, T. Synlett 2001, 1751-1754; (c) Tanaka, H.; Adachi, M.; Tsukamoto, H.; Ikeda, T.; Yamada, H.; Takahashi, T. Org. Lett. 2002, 4, 4213-4216.
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For synthetic studies of phytoalexin elicitors in soybeans, see: (a) Yamada, H.; Harada, T.; Takahashi, T. J. Am. Chem. Soc. 1994, 116, 7919-7920; (b) Yamada, H.; Takimoto, H.; Ikeda, T.; Tsukamoto, H.; Harada, T.; Takahashi, T. Synlett 2001, 1751-1754; (c) Tanaka, H.; Adachi, M.; Tsukamoto, H.; Ikeda, T.; Yamada, H.; Takahashi, T. Org. Lett. 2002, 4, 4213-4216.
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For synthetic studies of phytoalexin elicitors in soybeans, see: (a) Yamada, H.; Harada, T.; Takahashi, T. J. Am. Chem. Soc. 1994, 116, 7919-7920; (b) Yamada, H.; Takimoto, H.; Ikeda, T.; Tsukamoto, H.; Harada, T.; Takahashi, T. Synlett 2001, 1751-1754; (c) Tanaka, H.; Adachi, M.; Tsukamoto, H.; Ikeda, T.; Yamada, H.; Takahashi, T. Org. Lett. 2002, 4, 4213-4216.
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For synthetic studies of phytoalexin elicitors in rice, see: (a) Amaya, T.; Tanaka, H.; Yamaguchi, T.; Shibuya, N.; Takahashi, T. Tetrahedron Lett. 2001, 42, 9191-9194; (b) Takahashi, T.; Okano, A.; Amaya, T.; Tanaka, H.; Doi, T. Synlett 2002, 911-914.
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Takahashi, T.5
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For synthetic studies of phytoalexin elicitors in rice, see: (a) Amaya, T.; Tanaka, H.; Yamaguchi, T.; Shibuya, N.; Takahashi, T. Tetrahedron Lett. 2001, 42, 9191-9194; (b) Takahashi, T.; Okano, A.; Amaya, T.; Tanaka, H.; Doi, T. Synlett 2002, 911-914.
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Okano, A.2
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Tanaka, H.4
Doi, T.5
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14
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0032476094
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For orthogonal deprotection strategy on a mono-saccharide scaffold, see: (a) Wunberg, T.; Kallus, C.; Opatz, T.; Henke, S.; Schmidt, W.; Kunz, H. Angew. Chem., Int. Ed. 1998, 37, 2503-2505; (b) Wong, C.-H.; Ye, X.-S.; Zhang, Z. J. Am. Chem. Soc. 1998, 120, 7137-7138; (c) Kallus, C.; Opatz, T.; Wunberg, T.; Schmidt, W.; Henke, S.; Kunz, H. Tetrahedron Lett. 1999, 40, 7783-7786; (d) Zhu, T.; Boons, G.-J. Tetrahedron: Asymmetry 2000, 11, 199-205.
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Wunberg, T.1
Kallus, C.2
Opatz, T.3
Henke, S.4
Schmidt, W.5
Kunz, H.6
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15
-
-
0032558124
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-
For orthogonal deprotection strategy on a mono-saccharide scaffold, see: (a) Wunberg, T.; Kallus, C.; Opatz, T.; Henke, S.; Schmidt, W.; Kunz, H. Angew. Chem., Int. Ed. 1998, 37, 2503-2505; (b) Wong, C.-H.; Ye, X.-S.; Zhang, Z. J. Am. Chem. Soc. 1998, 120, 7137-7138; (c) Kallus, C.; Opatz, T.; Wunberg, T.; Schmidt, W.; Henke, S.; Kunz, H. Tetrahedron Lett. 1999, 40, 7783-7786; (d) Zhu, T.; Boons, G.-J. Tetrahedron: Asymmetry 2000, 11, 199-205.
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J. Am. Chem. Soc.
, vol.120
, pp. 7137-7138
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Wong, C.-H.1
Ye, X.-S.2
Zhang, Z.3
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16
-
-
0033615762
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-
For orthogonal deprotection strategy on a mono-saccharide scaffold, see: (a) Wunberg, T.; Kallus, C.; Opatz, T.; Henke, S.; Schmidt, W.; Kunz, H. Angew. Chem., Int. Ed. 1998, 37, 2503-2505; (b) Wong, C.-H.; Ye, X.-S.; Zhang, Z. J. Am. Chem. Soc. 1998, 120, 7137-7138; (c) Kallus, C.; Opatz, T.; Wunberg, T.; Schmidt, W.; Henke, S.; Kunz, H. Tetrahedron Lett. 1999, 40, 7783-7786; (d) Zhu, T.; Boons, G.-J. Tetrahedron: Asymmetry 2000, 11, 199-205.
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(1999)
Tetrahedron Lett.
, vol.40
, pp. 7783-7786
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Kallus, C.1
Opatz, T.2
Wunberg, T.3
Schmidt, W.4
Henke, S.5
Kunz, H.6
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17
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0033998234
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For orthogonal deprotection strategy on a mono-saccharide scaffold, see: (a) Wunberg, T.; Kallus, C.; Opatz, T.; Henke, S.; Schmidt, W.; Kunz, H. Angew. Chem., Int. Ed. 1998, 37, 2503-2505; (b) Wong, C.-H.; Ye, X.-S.; Zhang, Z. J. Am. Chem. Soc. 1998, 120, 7137-7138; (c) Kallus, C.; Opatz, T.; Wunberg, T.; Schmidt, W.; Henke, S.; Kunz, H. Tetrahedron Lett. 1999, 40, 7783-7786; (d) Zhu, T.; Boons, G.-J. Tetrahedron: Asymmetry 2000, 11, 199-205.
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(2000)
Tetrahedron: Asymmetry
, vol.11
, pp. 199-205
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Zhu, T.1
Boons, G.-J.2
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18
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0026571742
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The use of Alloc as a hydroxyl protecting group in oligosaccharide synthesis has been reported in a few examples. See: (a) Teshima, T.; Nakajima, K.; Takahashi, M.; Shiba, T. Tetrahedron Lett. 1992, 33, 363-366; (b) Harada, T.; Yamada, H.; Tsukamoto, H.; Takahashi, T. J. Carbohydr. Chem. 1995, 14, 165-170; (c) Depré, D.; Düffels, A.; Green, L. G.; Lenz, R.; Ley, S. V.; Wong, C.-H. Chem. Eur. J. 1999, 5, 3326-3340; (d) Adinolfi, M.; Barone, G.; Guariniello, L.; Iadonisi, A. Tetrahedron Lett. 2000, 41, 9305-9309.
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(1992)
Tetrahedron Lett.
, vol.33
, pp. 363-366
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Teshima, T.1
Nakajima, K.2
Takahashi, M.3
Shiba, T.4
-
19
-
-
21844500889
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-
The use of Alloc as a hydroxyl protecting group in oligosaccharide synthesis has been reported in a few examples. See: (a) Teshima, T.; Nakajima, K.; Takahashi, M.; Shiba, T. Tetrahedron Lett. 1992, 33, 363-366; (b) Harada, T.; Yamada, H.; Tsukamoto, H.; Takahashi, T. J. Carbohydr. Chem. 1995, 14, 165-170; (c) Depré, D.; Düffels, A.; Green, L. G.; Lenz, R.; Ley, S. V.; Wong, C.-H. Chem. Eur. J. 1999, 5, 3326-3340; (d) Adinolfi, M.; Barone, G.; Guariniello, L.; Iadonisi, A. Tetrahedron Lett. 2000, 41, 9305-9309.
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(1995)
J. Carbohydr. Chem.
, vol.14
, pp. 165-170
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Harada, T.1
Yamada, H.2
Tsukamoto, H.3
Takahashi, T.4
-
20
-
-
0032729977
-
-
The use of Alloc as a hydroxyl protecting group in oligosaccharide synthesis has been reported in a few examples. See: (a) Teshima, T.; Nakajima, K.; Takahashi, M.; Shiba, T. Tetrahedron Lett. 1992, 33, 363-366; (b) Harada, T.; Yamada, H.; Tsukamoto, H.; Takahashi, T. J. Carbohydr. Chem. 1995, 14, 165-170; (c) Depré, D.; Düffels, A.; Green, L. G.; Lenz, R.; Ley, S. V.; Wong, C.-H. Chem. Eur. J. 1999, 5, 3326-3340; (d) Adinolfi, M.; Barone, G.; Guariniello, L.; Iadonisi, A. Tetrahedron Lett. 2000, 41, 9305-9309.
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(1999)
Chem. Eur. J.
, vol.5
, pp. 3326-3340
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-
Depré, D.1
Düffels, A.2
Green, L.G.3
Lenz, R.4
Ley, S.V.5
Wong, C.-H.6
-
21
-
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0034716025
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-
The use of Alloc as a hydroxyl protecting group in oligosaccharide synthesis has been reported in a few examples. See: (a) Teshima, T.; Nakajima, K.; Takahashi, M.; Shiba, T. Tetrahedron Lett. 1992, 33, 363-366; (b) Harada, T.; Yamada, H.; Tsukamoto, H.; Takahashi, T. J. Carbohydr. Chem. 1995, 14, 165-170; (c) Depré, D.; Düffels, A.; Green, L. G.; Lenz, R.; Ley, S. V.; Wong, C.-H. Chem. Eur. J. 1999, 5, 3326-3340; (d) Adinolfi, M.; Barone, G.; Guariniello, L.; Iadonisi, A. Tetrahedron Lett. 2000, 41, 9305-9309.
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(2000)
Tetrahedron Lett.
, vol.41
, pp. 9305-9309
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Adinolfi, M.1
Barone, G.2
Guariniello, L.3
Iadonisi, A.4
-
22
-
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0030030822
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-
The use of Fmoc as a hydroxyl protecting group in oligosaccharide synthesis has been reported in a few examples. See: (a) Freese, S. J.; Vann, W. F. Carbohydr. Res. 1996, 281, 313-319; (b) Nicolaou, K. C.; Winssinger, N.; Pastor, J.; DeRoose, F. J. Am. Chem. Soc. 1997, 119, 449-450; (c) Nicolaou, K. C.; Watanabe, N.; Li, J.; Pastor, J.; Winssinger, N. Angew. Chem., Int. Ed. 1998, 37, 1559-1561; (d) Roussel, F.; Knerr, L.; Grathwohl, M.; Schmidt, R. R. Org. Lett. 2000, 2, 3043-3046; (e) Zhu, T.; Boons, G.-J. J. Am. Chem. Soc. 2000, 122, 10222-10223; (f) Wu, X.; Grathwohl, M.; Schmidt, R. R. Org. Lett. 2001, 3, 747-750.
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Carbohydr. Res.
, vol.281
, pp. 313-319
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Freese, S.J.1
Vann, W.F.2
-
23
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0031048191
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The use of Fmoc as a hydroxyl protecting group in oligosaccharide synthesis has been reported in a few examples. See: (a) Freese, S. J.; Vann, W. F. Carbohydr. Res. 1996, 281, 313-319; (b) Nicolaou, K. C.; Winssinger, N.; Pastor, J.; DeRoose, F. J. Am. Chem. Soc. 1997, 119, 449-450; (c) Nicolaou, K. C.; Watanabe, N.; Li, J.; Pastor, J.; Winssinger, N. Angew. Chem., Int. Ed. 1998, 37, 1559-1561; (d) Roussel, F.; Knerr, L.; Grathwohl, M.; Schmidt, R. R. Org. Lett. 2000, 2, 3043-3046; (e) Zhu, T.; Boons, G.-J. J. Am. Chem. Soc. 2000, 122, 10222-10223; (f) Wu, X.; Grathwohl, M.; Schmidt, R. R. Org. Lett. 2001, 3, 747-750.
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Am. Chem. Soc.
, vol.119
, pp. 449-450
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Nicolaou, K.C.1
Winssinger, N.2
Pastor, J.3
DeRoose, F.J.4
-
24
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0032547050
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The use of Fmoc as a hydroxyl protecting group in oligosaccharide synthesis has been reported in a few examples. See: (a) Freese, S. J.; Vann, W. F. Carbohydr. Res. 1996, 281, 313-319; (b) Nicolaou, K. C.; Winssinger, N.; Pastor, J.; DeRoose, F. J. Am. Chem. Soc. 1997, 119, 449-450; (c) Nicolaou, K. C.; Watanabe, N.; Li, J.; Pastor, J.; Winssinger, N. Angew. Chem., Int. Ed. 1998, 37, 1559-1561; (d) Roussel, F.; Knerr, L.; Grathwohl, M.; Schmidt, R. R. Org. Lett. 2000, 2, 3043-3046; (e) Zhu, T.; Boons, G.-J. J. Am. Chem. Soc. 2000, 122, 10222-10223; (f) Wu, X.; Grathwohl, M.; Schmidt, R. R. Org. Lett. 2001, 3, 747-750.
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Angew. Chem., Int. Ed.
, vol.37
, pp. 1559-1561
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Nicolaou, K.C.1
Watanabe, N.2
Li, J.3
Pastor, J.4
Winssinger, N.5
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25
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0034609692
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The use of Fmoc as a hydroxyl protecting group in oligosaccharide synthesis has been reported in a few examples. See: (a) Freese, S. J.; Vann, W. F. Carbohydr. Res. 1996, 281, 313-319; (b) Nicolaou, K. C.; Winssinger, N.; Pastor, J.; DeRoose, F. J. Am. Chem. Soc. 1997, 119, 449-450; (c) Nicolaou, K. C.; Watanabe, N.; Li, J.; Pastor, J.; Winssinger, N. Angew. Chem., Int. Ed. 1998, 37, 1559-1561; (d) Roussel, F.; Knerr, L.; Grathwohl, M.; Schmidt, R. R. Org. Lett. 2000, 2, 3043-3046; (e) Zhu, T.; Boons, G.-J. J. Am. Chem. Soc. 2000, 122, 10222-10223; (f) Wu, X.; Grathwohl, M.; Schmidt, R. R. Org. Lett. 2001, 3, 747-750.
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(2000)
Org. Lett.
, vol.2
, pp. 3043-3046
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-
Roussel, F.1
Knerr, L.2
Grathwohl, M.3
Schmidt, R.R.4
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26
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0034684254
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The use of Fmoc as a hydroxyl protecting group in oligosaccharide synthesis has been reported in a few examples. See: (a) Freese, S. J.; Vann, W. F. Carbohydr. Res. 1996, 281, 313-319; (b) Nicolaou, K. C.; Winssinger, N.; Pastor, J.; DeRoose, F. J. Am. Chem. Soc. 1997, 119, 449-450; (c) Nicolaou, K. C.; Watanabe, N.; Li, J.; Pastor, J.; Winssinger, N. Angew. Chem., Int. Ed. 1998, 37, 1559-1561; (d) Roussel, F.; Knerr, L.; Grathwohl, M.; Schmidt, R. R. Org. Lett. 2000, 2, 3043-3046; (e) Zhu, T.; Boons, G.-J. J. Am. Chem. Soc. 2000, 122, 10222-10223; (f) Wu, X.; Grathwohl, M.; Schmidt, R. R. Org. Lett. 2001, 3, 747-750.
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(2000)
J. Am. Chem. Soc.
, vol.122
, pp. 10222-10223
-
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Zhu, T.1
Boons, G.-J.2
-
27
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0035826338
-
-
The use of Fmoc as a hydroxyl protecting group in oligosaccharide synthesis has been reported in a few examples. See: (a) Freese, S. J.; Vann, W. F. Carbohydr. Res. 1996, 281, 313-319; (b) Nicolaou, K. C.; Winssinger, N.; Pastor, J.; DeRoose, F. J. Am. Chem. Soc. 1997, 119, 449-450; (c) Nicolaou, K. C.; Watanabe, N.; Li, J.; Pastor, J.; Winssinger, N. Angew. Chem., Int. Ed. 1998, 37, 1559-1561; (d) Roussel, F.; Knerr, L.; Grathwohl, M.; Schmidt, R. R. Org. Lett. 2000, 2, 3043-3046; (e) Zhu, T.; Boons, G.-J. J. Am. Chem. Soc. 2000, 122, 10222-10223; (f) Wu, X.; Grathwohl, M.; Schmidt, R. R. Org. Lett. 2001, 3, 747-750.
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(2001)
Org. Lett.
, vol.3
, pp. 747-750
-
-
Wu, X.1
Grathwohl, M.2
Schmidt, R.R.3
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29
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85031210178
-
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note
-
31Si: C, 68.54; H, 5.90. Found: C, 65.55; H, 6.01%.
-
-
-
-
31
-
-
85031196002
-
-
note
-
4 (5 mg, 4.3 μmol) in THF (0.2 mL) were added to each of the reaction vessels 1-4 at room temperature. The reaction mixtures were stirred at the same temperature for 15 min. For removal of the Fmoc group, a solution of piperidine (20 μL, 0.20 mmol) in THF (0.2 mL) was added to each of the reaction vessels 2, 3, 5, and 6 at room temperature. The reaction mixtures were stirred at the same temperature for 15 min. For removal of the Lev group, a solution of hydrazine (29 μL, 0.93 mmol)-acetic acid (73 μL, 1.28 mmol) in THF (0.2 mL) was added to each of the reaction vessels 3, 4, 6, and 7 at the same temperature. After stirring at the same temperature for 30 min, the reaction mixtures were automatically subjected to flash chromatography in parallel fashion, eluting with hexane: ethyl acetate (1: 4) to give the seven tetrasaccharides 4a (26.4 mg, 0.013 mmol, 79% yield), 4b (26.3 mg, 0.014 mmol, 79% yield), 4c (25.8 mg, 0.014 mmol, 83% yield), 4d (24.4 mg, 0.014 mmol, 83% yield), 4e (22.7 mg, 0.013 mmol, 76% yield) 4f (24.4 mg, 0.013 mmol, 77% yield), 4g (24.0 mg, 0.015 mmol, 85% yield), respectively.
-
-
-
-
32
-
-
85031202328
-
-
L-COS™ is purchased from Moritex Corporation, Japan.
-
L-COS™ is purchased from Moritex Corporation, Japan.
-
-
-
-
33
-
-
85031200329
-
-
Combi Flash™ automated column chromatograph with ten parallel columns is purchased from Isco, Incorporation.
-
Combi Flash™ automated column chromatograph with ten parallel columns is purchased from Isco, Incorporation.
-
-
-
-
34
-
-
85031201519
-
-
note
-
+): 1170.4147, found 1170.4194.
-
-
-
-
35
-
-
85031203973
-
-
13C NMR, and MS) of pentaglycosides 3a and 3b were identical with those of our previous reported authentic samples, see Ref. 5a.
-
13C NMR, and MS) of pentaglycosides 3a and 3b were identical with those of our previous reported authentic samples, see Ref. 5a.
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