Sarcotragins A (1) and B (2), two terpenoid alkaloids of an unusual structu
ral class, have been isolated from the sponge Sarcotragus sp. collected fro
m Jaeju Island, Korea. The structures of these compounds have been determin
ed as lineal trisnorsesterterpenes containing a phenethylamine lactam or th
e corresponding glycine lactam moiety by combined chemical and spectral met
hods. (C) 2001 Elsevier Science Ltd. All rights reserved.