2-氧代哌啶-3-羧酸

2-氧-3-哌啶羧酸乙酯

9,10,11,12-tetrahydro-4H-pyrido[2,1-b]quinazoline-4,9-dione

methyl N-(4-chloro-5H-1,2,3-dithiazol-5-ylidene)-anthranilate

2-氨基吡啶