Phenolic Glycosides from Nuo-Mi-Xang-Cao, a Chinese Acanthaceous Herb

From leaves of nuo-mi-xang-cao, a Chinese acanthaceous herb collected at Xi-shuang-ban-na, Yunnan, two new phenolic glycosides called nuomioside A and isonuomioside A were isolated and determined to be composed of 3, 4-dihydroxyphenethylalcohol-(3'-O-β-D-apiosyl-4'-O-caffeoyl)-β-D-glucopyranoside and 3, 4-dihydroxy-phenethylalcohol-3'-O-β-apiosyl-6'-O-caffeoyl)-β-D-glucopyranoside, respectively. Together with these compounds, known phenolic glycosides, acteoside, isoacteoside, crassifolioside, apigenin 7-O-β-D-glucuronide and its methyl ester were also identified in the leaves.