186581-53-3
重氮甲烷
+
32704-58-8
ethyl 4-amino-2-methyl-1H-imidazole-5-carboxylate
→
55747-02-9
ethyl 5-amino-2,3-dimethylimidazole-4-carboxylate
83325-09-1
2,7,8-trimethyl-1-phenylpurin-6-one