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1
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0344246300
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note
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Pliny's opening of the paragraph on pityusa in his Naturalis Historia has often been quoted: Cum honore et pityusa simile de causa dicetur, quamdam in tithymali genere numerant (Honorable mention will now be made of pityusa, which some include in the same class as tithymalus) (XXIV, XXXI).
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2
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0345540075
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Turner, R. Euphorbias; Batsford: London, 1995; pp 148-149.
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Turner, R.1
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5
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0000335314
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(a) Adolf, W.; Hecker, E.; Balmain, A.; Lhomme, M. F.; Nakatani, Y.; Ourisson, G.; Ponsinet, G.; Pryce, R. J.; Santhanakrishnan, T. S.; Matyukhina, L. G.; Saltikova, I. A. Tetrahedron Lett. 1970, 2241-2244.
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Saltikova, I.A.11
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6
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0032912055
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(b) Appendino, G.; Tron, G. C.; Cravotto, G.; Palmisano, G.; Jakupovic, J. J. Nat. Prod. 1999, 62, 76-79.
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7
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0000486418
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Itokawa, H.; Ichihara, Y.; Yahagi, M.; Watanabe, K.; Takeya, K. Phytochemistry 1990, 29, 2025-2026.
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8
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85027475123
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This compound was isolated as early as 1890 but was originally considered a steroid and named "euphorbiasteroid" (Tahara, Y. Chem. Ber. 1890, 23, 3347-3351).
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Tahara, Y.1
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10
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0345540074
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note
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The use of monomeric triphenylphosphine gave a product which could not be satisfactorily separated from triphenylphosphine oxide by crystallization or chromatography.
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11
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0031846217
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Appendino, G.; Jakupovic, S.; Tron, G. C.; Jakupovic, J.; Milon, V.; Ballero, M. J. Nat. Prod. 1998, 61, 749-756.
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49649151469
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Narayanan, P.1
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Adolf, W.7
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13
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0003147827
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Zechmeister, K.; Rörl, M.; Brandl, F.; Heehfischer, S.; Hoppe, W.; Hecker, E.; Adolf, W.; Kubinyi, H. Tetrahedron Lett. 1970, 3071-3073.
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14
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0345108658
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® and its Derivatives; Farina, V., Ed.; Elsevier: Amsterdam, 1995; pp 56-58) and rather different from the ones calculated from Woodward's rules. Ring strain and the presence of a vinyl group adjacent to the endocyclic double bond probably underlay this remarkable bathochromic shift. For these reasons, the differences between the UV spectra of 1c and 3b are difficult to rationalize.
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0028979464
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This hydrogen bond is typical of all phorboid 13-esters, and was even detected in the X-ray analysis of phorbol 13-acetate bound to a fragment of PKC δ (Zhang, G.; Kazanietz, M. G.; Blumberg, P. M.; Hurley, J. H. Cell 1995, 81, 917-924).
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