methyl 2-hydroxy-4-methoxy-6-(methoxycarbonylmethyl)benzoate

8-hydroxy-6-methoxy-1H-2-benzopyran-1,3(4H)-dione

(2-carboxy-3-hydroxy-5-methoxyphenyl)acetic acid

1,4,7-三羟基-5-甲氧基-2-甲基蒽-9,10-二酮

Rubrocristin-β-benzylether