Tetrahedron p. 6003 - 6014 (1995)
Update date:2022-08-25
Topics:
Morita, Hiroshi
Yun, Young Sook
Takeya, Koichi
Itokawa, Hideji
Yamada, Kenji
Three new cyclic peptides, segetalins B, C and D, were isolated from Vaccaria segetalis (seeds) and their structures were elucidated by 2D NMR and chemical degradations.Conformational analysis of segetalin B, having an estrogen-like effect, was made by using high field NMR and computational methods.Segetalin B was suggested to possess a solution conformation similar to that of segetalin A in the region of Trp-Ala-Gly-Val.The sequence and conformation of Trp-Ala-Gly-Val may play an important role to show the activity.
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