Homoisoflavonoids and related compounds. III. Phenolic constituents of Caesalpinia japonica Sieb. et Zucc.

Abstract

A new homoisoflavonoid, 3'-deoxy-4-O-methylsappanol (3, 7-dihydroxy-3- (4-hydroxybenzyl) 4-methoxychroman) was isolated from the wood of Caesalpinia japonica SIEB. et Zucc. (Leguminosae), together with the known compounds, sappanol, episappanol, 4-O-methylsappanol, 4-O-methylepisappanol, sappanones A and B, sappanchalcone, 3-deoxysappanchalcone, isoliquiritigenin, butein, brazilin and protosappanins A, B and C. None of these compounds has previously been isolated from this plant.