7-羟基-4-甲基-3-香豆素乙酸

2-(3,5-dimethyl-7-oxofuro[3,2-g]chromen-6-yl)acetic acid

(7-甲氧基-4-甲基-2-氧代-2H-苯并吡喃-3-基)乙酸

(2',3',5'-trimethyl-7'-oxo-7H-furo[3,2-g][1]benzopyran-6'-yl)acetic acid

(4'-methyl-2'-oxo-6',7',8',9'-tetrahydrobenzofuro[3,2-g]-1-benzopyran-3'-yl)acetic acid