7-acetyl-6-hydroxy-3-methyl-benzofuran-2-carboxylic acid

(2-nitro-1-phenylethyl)benzene

2,6,6-trimethyl-3-oxocyclohexene-1-carboxylic acid

吡啶

1-氧代-1,2-二氢-4-异喹啉甲酸