103505-09-5
dimethyl 4-oxocyclohexane-1,3-dicarboxylate
→
5458-56-0
2,4-二氯-5,6,7,8-四氢喹唑啉-6-羧酸
5439-88-3
2,4-dioxo-5,6,7,8-tetrahydro-1H-quinazoline-6-carboxylic acid