Chemical constituents of the japanese liverwort Plagiochasma pterospermum

摘要

From the ether and ethyl acetate extracts of the Japanese liverwort, Plagiochasma pterospermum (Aytoniaceae), the sesquiterpene alcohol, (+)-gymnomitr-8(12)-en-9α-ol, the triterpene alcohol, α-zeorin and two macrocyclic bis(bibenzyls), pakyonol and riccardin C have been isolated, together with p-hydroxybenzaldehyde and their structures elucidated. P. pterospermum is chemically very similar to P. appendiculata, and Reboulia hemisphaerica, belonging to the same family as that of the Plagiochasma.