2，2’，3，4，4’-五羟基二苯甲酮

1,3,5,6-tetrahydroxyxanthen-9-one

1-hydroxy-3,5,6-trimethoxyxanthen-9-one

methyl 2,3-dihydroxy-4-methoxybenzoate

2,3-二甲氧基氢化喹啉