Chemical constituents from Impatiens pritzllii var. hupehensis

Eight compounds were isolated from the 50% ethanol extract of Impatiens pritzllii var.hupehensis through various column chromatography methods including silica gel, Sephadex LH-20, and preparative HPLC. Their structures were elucidated as 2,6-dimethyl-2-vinyl-2,3,4,7-tetrahydrooxepine(1), 1,3,6-trihydroxy-7-methyl-anthraquinone(2),4-hydroxybenzaldehyde(3),4-(3-methoxy-4-hydroxyphenyl)-2-butanone(4), podophyllotoxin(5),scopoletin(6), α-spinasterol(7) and 3-O-β-D-glucopyranosyl-α-spinasterol(8) based on the NMR and MS spectral data. Compound 1 is new compound and compounds 2-8 are isolated from this plant for the first time.