5,5-diethoxy-2-methylpent-3-yn-2-ol

7-氨基-2-甲基-恶唑并[5,4-d]嘧啶

ethyl 4,4-diethoxybut-2-enoate

[1,2,4]triazolo[4,3-a]pyrimidine

3,4,5-三甲基-1H-吡咯-2-羧醛