Commicarpiflavonol Glucosides A and B; Two New 5-Deoxyflavonol Glucosides from Commicarpus grandiflorus

The phytochemical investigation of the aerial parts of Commicarpus grandiflorus ( Standl.) resulted in the isolation of two new flavonol 3-O-glucosides, commicarpiflavonol glucoside A (1) and commicarpiflavonol glucoside B (2), along with the known compounds β-sitosterol (3) and betulinic acid (4). The structures of the isolated compounds have been elucidated by extensive 1D ( 1H, 13C) and 2D (COSY, HSQC, HMBC) NMR spectral data analysis, as well as high-resolution mass determinations.