Chemical investigation of the methanol extract from *** yielded seven known compounds:friedelin, friedelanol,lupeol,1,7-dihydroxyxanthone（1）,1,4,8-trihydroxyxanthone（2）,1,2,8-trihydroxyxanthone（3）and physcion（4...
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Chemical investigation of the methanol extract from *** yielded seven known compounds:friedelin, friedelanol,lupeol,1,7-dihydroxyxanthone（1）,1,4,8-trihydroxyxanthone（2）,1,2,8-trihydroxyxanthone（3）and physcion（4）;that of the extract of *** also gave seven known compounds:laurenquinone A（5）, laurenquinone B（6）,xanthone V（7）,laurentixanthone C（8）,bivismiaquinone（9）,vismiaquinone（10）and vismiaquinone B（11）.Laurenquinone B（6）and xanthone V（7）were subjected to acetylation to afford two new acetylated derivatives:methyl 5,7-diacetoxy-6,11-dihydro-2,2,9-trimethyl-6,11-dioxo-2H-naphto[2,3-g]chromene-
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