Mj. Uddin et al., Haterumaimides F-I, four new cytotoxic diterpene alkaloids from an ascidian Lissoclinum species, J NAT PROD, 64(9), 2001, pp. 1169-1173
Four new monochlorinated diterpene alkaloids, haterumaimides F-I (1-4), and
two known ones, dichlorolissoclimide and chlorolissoclimide, were isolated
from an ascidian Lissoclinum, sp. Their structures with absolute stereoche
mistries were elucidated by chemical and spectral analyses. Haterumaimides
F-I (1-4) inhibited the first cleavage of fertilized sea urchin eggs and ex
hibited potent to weak cytotoxicities against P388 cells.