7-甲氧基-2-甲基喹啉-4-羧酸

6-Methyl-2-(4-methylphenyl)quinoline-4-carboxylic acid

(2S,4S)-4-hydroxy-2,3,4,5-tetrahydropyridine-2,6-dicarboxylic acid

甲基(2R,4S)-4-羟基-2-哌啶羧酸酯

1-methyl-2,3,4,9-tetrahydropyrido[3,4-b]indole-1,3-dicarboxylic acid