Studies on the constituents of palmae plants. III. The constituents of Chamaerops humilis L. and Trachycarpus wagnerianus Becc.

The constituents of the leaves, stems and underground parts of Chamaerops humilis L. and Trachycarpus wagnerianus BECC. (Palmae) have been investigated. We isolated and identified methyl proto-dioscin and methyl proto-Pb from the stems, dioscin, Pb, methyl proto-dioscin, methyl proto-Pb and methyl proto-rhapissaponin from the underground parts, and tricin 7-O-rutinoside and methyl proto-Pb from the leaves of C. humilis L. On the other hand, we isolated and identified methyl proto-dioscin and pseudoproto-dioscin from the stems, Pb, Tg, methyl proto-Pb and pseudoproto-Pb from the underground parts, and glucoluteolin, scolymoside, methyl proto-Pb and pseudoproto-Pb from the leaves of T. wagnerianus BECC. This is the first report of the isolation of tricin 7-O-β-rutinoside, Tg and pseudodiosgenin oligosides from Palmae plants, and also the first discovery of pseudosteroidal saponin from natural sources.