diethyl 2-[[(6-amino-2-methylsulfanylpyrimidin-4-yl)amino]methylidene]propanedioate

2-ethylbenzotriazole

1-乙基-1H-苯并三唑

(E)-ethyl 3-(1H-benzo[d][1,2,3]triazol-1-yl)acrylate

diethyl 2-(hydroxymethylidene)propanedioate