4-氧代-4H-苯并吡喃-2-羧酸甲酯

2-色满羰基氯化物

色满-2-羧酸

2'-羟基苯乙酮

(7Z)-7-(6-oxocyclohexa-2,4-dien-1-ylidene)-1,2,3,4-tetrahydro-1,4-diazepine-5-carboxylic acid