Two new isoflavonoid glucosides, 5-hydroxy-6,7-methylenedioxy-isoflavone-4＇-O-D-glucopyranosyl （2→〉l）-L-rhamnoside （irilone-bioside） （compound 1） and 5,4＇-methoxy-6,7-methylenedioxyisoflavone-3＇-O-β-D-glucoside （irisleptophyllidin） （compound 2）, together with five known compounds, nigricanin- 4＇-O-β-D-glucoside （compound 3）, irifloside （compound 4）, irigenin （compound 5）, 5, 3＇, 4＇-trimethoxy-6,7-methylenedioxyisoflavone （compound 6）, and nigricanin （compound 7） were isolated from the alcoholic extract of rhizomes of Iris leptophylla Lingelsh. Their structures were elucidated by spectroscopic methods.
A new C-glycosylflavone,5-hydroxyl-4′,7-dimethoxyflavone-6-C-[0-(α-L-3″-acetylrhamno-pyranosy)-1→2-β-D-glucopyranoside](1),along with five known C-glycosylflavones,5-hydroxy-4′,7-dimethoxyfavone-6-C-[0-(α-L-2′″-acetylrhamnopyranosy1)-1→2-β-D-glucopyranoside](2),embinin(3),embigenin(4),swertisin(5)and swertiajaponin(6)were isolated from the leaves of Iris tectorum Maxim.Their structures were elucidated on the basis of extensive NM R experiments and spectral methods and their cytotoxic activities against A 549(lung cancer)human cell lines were determined.
