Two new compounds have been isolated from the pistils and stamens of Hibiscus moscheutos L. and these compounds were determined to be 3,5,7,8,4' -pentahydroxyflavone 7-O- α -rhamnopyranoside (VIII) and 2-oxindole-3-acetylaminomethylaspartic acid (X) by chemical and spectroscopic methods. Nine known compounds, β -sitosterol (I), ikshusterol (II), epi-ikshusterol (III), methyl linolenate (IV), β -sitosteryl- β -p-glucoside (V), quercimeritrin (VI), kaempferol-7-O- α rhamnopyranoside (VII), methyl dioxindole-3-acetate (IX) and rutin (XI), were also isolated.