New aromatic sesquiterpenes from a Halichondria sp

Abstract

Three new aromatic sesquiterpenes have been isolated from a Halichondria sp, found off the Western Australian coast. Evidence is presented for the structure of (1'Z)- and (1'E)-2-(1',5'-dimethylhexa- 4'-dienyl)-5-methylbenzene-1,4-diol and of (1'E)-2-(1',5'-dimethylhexa-1',4'-dienyl)-5-methyl-phenyl acetate.