ethyl 4-acetylpyridine-2-carboxylate

ethyl α-(Z-phenylhydrazono)propionate

ethyl 2-(phenylhydrazinylidene)propanoate

4-amino-6-methyl-2-methylsulfanylpyrimido[4,5-b][1,4]oxazin-7-one

6-甲基-2-甲硫基-4,7(3H,8H)-蝶啶二酮