The chemical constituents of Elsholtzia blanda

Nine compounds were isolated from Elsholtzia blanda (Benth.) Benth. Their structures were identified with spectral and chemical methods as follows: 5,6-dihydro-6-styry-2-pyrone (1), friedelin (2), 4-hydroxy-3-methoxystyrene (3), 5,2'-dimethoxy-6, 7-methylene dioxyflavanone (4), 5-hydroxy-7-methoxy-6-O-[alpha -L-rhamnopyranosyl(1 -->2) -beta -D-fucopyranosyl] flavone glycoside (5), 5, 5'-dihydroxy-7-acetoxyl-6, 8, 3",3"-tetramethylpyran (3',4') navone (6), 5, 5'-dihydroxy-7-(alpha -methyl) butyroxyl-6, 8, 3 ", 3"-tetramethylpyran (3',4') flavone (7), 5,5'-dihydroxy-6, 7-methylenedioxy-8, 3", 3"-trimethylpyran (3',4') navone (8), glucosyringic acid (9). Among them, 6, 7 and 8 are new compounds, named as sifanghaoine I,II and III, respectively.