New congeners of bistheonellides from Okinawan marine sponges of the genus Theonella

Abstract

Four new bistheonellide-related compounds, bistheonellide C, isobistheonellide A and bistheonellic acids A and B, have been isolated from Okinawan marine sponges of the genus Theonella, and their structures elucidated by spectral and chemical means.