- Alpneumines A-H, new anti-melanogenic indole alkaloids from Alstonia pneumatophora.
Alpneumines A-H, new anti-melanogenic indole alkaloids from Alstonia pneumatophora.
Bioorganic & medicinal chemistry (2010-06-26)
Koichiro Koyama, Yusuke Hirasawa, Takahiro Hosoya, Teh Chin Hoe, Kit-Lam Chan, Hiroshi Morita
PMID20576577
ABSTRACT
Eight new indole alkaloids, alpneumines A-H (1-8) were isolated from the Malaysian Alstonia pneumatophora (Apocynaceae) and their structures were determined by MS and 2D NMR spectroscopic methods. Alpneumines E and G (5 and 7), vincamine, and apovincamine showed anti-melanogenesis in B16 mouse melanoma cells.