优咕吨酮

(8-acetyloxy-6-methoxy-9-oxoxanthen-2-yl) acetate

1-羟基-3,7-二甲氧基氧杂蒽酮

1,3,7-三甲氧基氧杂蒽-9-酮

2,6-dimethoxyxanthen-9-one