BEBRYAZULENE, A NEW GUAIANE METABOLITE FROM THE INDIAN-OCEAN GORGONIAN CORAL, BEBRYCE GRANDICALYX

Bebryazulene (1), a new sesquiterpene having the guaiane skeleton, was isolated from the methanol-chloroform 1:2 extract of the Indian Ocean gorgonian coral Bebryce grandicalyx (Kuekenthal) collected in the lag oon of Mayotte. Structure assignment was based on interpretation of sp ectroscopic data. This new metabolite was very labile and reacted with 4-phenyl-3H-1,2,4-triazoline-3,5-dione to yield an unexpected adduct.