生物活性: 1,4,5,6-Tetrahydroxy-7,8-diprenylxanthone is a xanthone that can be isolated from Garcinia xanthochymus. 1,4,5,6-Tetrahydroxy-7,8-diprenylxanthone shows moderate cytotoxicities against MDA-MB-435S and A549 cell lines with IC50s of 1.3 and 3.86 渭g/ml, respectively.