Durinskiol B:: A new durinskiol congener from the symbiotic marine dinoflagellate Durinskia sp.

Durinskiol B (1) was isolated from the symbiotic marine dinoflagellate Durinskia sp., along with durinskiol A (2). The planar structure of 1 was determined by detailed NMR analysis. Durinskiol B (1) has structure similarity with durinskiol A (2) except for the existence of one methyl excess in the side chain of durinskiol B.