3-氨基-5-氯-6-甲基-2-吡嗪甲腈

2-amino-7-ethoxy-6-methyl-4(3H)-pteridinone

ethyl 3-amino-5-chloro-6-methylpyrazine-2-carboxylate

2-氨基-6-甲基-4(3H)-蝶啶酮

丙酮酸甲酯