Hydroxybenzoquinones from Myrsinaceae Plants. III. The Structures of 2-Hydroxy-5-methoxy-3-pentadecenylbenzoquinone and Ardisiaquinones A, B and C from Ardisia spp.

Abstract

From the rhizomes of Ardisia japonica 2-hydroxy-5-methoxy-3-pentadecenylbenzoquinone contaminated with 3-tridecenyl and 3-tridecyl compounds (Ia) was obtained. Novel type bisbenzoquinonyl-olefin derivatives, designated ardisiaquinones A, B and C, were isolated from the root bark of Ardisia sieboldii and the structures (V-VII) have been elucidated.