New Naphthopyrone Pigments From the Crinoid Comanthus parvicirrus

Abstract

Two new naphthopyrones, 5,10-dihydroxy-8-methoxy-2-propyl-4H-naphtho[1,2-blpyran-4-one(4) and 5,8-dihydroxy-6,10-dimethoxy-2-propyl-4H-naphtho[2,3-blpyran-4-one (5), have been isolated from the crinoid Comanthus parvicirrus.