Chemical constituents from the whole plants of Sedum sarmentosum Bunge and their chemotaxonomic significance

Phytochemical study of the whole plants of Sedum sarmentosum Bunge (Crassulaceae) led to the isolation of thirty-six constituents, including sixteen megastigmanes (1-16), seven sterols (17-23), five lignans (24-28), three triterpenoids (29-31), three phenols (32-34), one flavonoid (35), and one glycoside (36). The chemical structures of these metabolites were elucidated by NMR spectroscopy and compared with literature data pre-viously reported. This is the first confirmation of the presence of eleven compounds (4, 15, 16, 18, 19, 22, 24-26, 28, 32) isolated from the family Crassulaceae, one compound (3) from the genus Sedum, and two compounds (17 and 33) from S. sarmentosum. Furthermore, the chemotaxonomic significance of these ingredients from the whole plants of S. sarmentosum were discussed in detail.