Halogenated and Non-halogenated Aromatic Sesquiterpenes from the Red Algae Laurencia okamurai Yamada

Abstract

The taxonomic reexamination of the red alga ‘L. intermedia Yamada,’ previously collected at Oshoro Bay, Hokkaido, showed that this alga consistd of a mixture of L. intermedia Yamada, L. capituliformis Yamada, and L. okamurai Yamada. Within the Japanese species of genus Laurencia, laurinterol and debromolaurinterol were found to be characteristic metabolites of L. okamurai, not of L. intermedia. In the course of this examination, dibromophenol and debromoaplysinol were newly isolated.