A novel type of a second epoxy bridge in eunicellane diterpenes: Isolationand characterization of massileunicellins A-C from the gorgonian Eunicellacavolinii
I. Mancini et al., A novel type of a second epoxy bridge in eunicellane diterpenes: Isolationand characterization of massileunicellins A-C from the gorgonian Eunicellacavolinii, HELV CHIM A, 82(10), 1999, pp. 1681-1689
Massileunicellins A (7), B (9), and C (11) - which show a novel type of a s
econd epoxy bridge in eunicellane diterpenes - were isolated from the gorgo
nian Eunicella cavoliniii collected near Marseille. Structural assignments
are based on NMR and MS data of these compounds and of their ketal derivati
ves 8, 10, and 12. Negligible activity of the massileunicellins on L1210 an
d KB tumor cell lines, and similar results for related known compounds, cas
t doubt on high cytotoxicity reported for the latter by other authors.