4-aminopteridine 3-oxide

2-ethoxymethyleneamino-3-cyanopyrazine

4-乙氧基-6-(三氟甲基)-5-嘧啶甲腈

5-Cyano-1-ethyl-4-(trifluoromethyl)-6(1H)-pyrimidinone

1,1,3,3-四乙氧基-2-甲基丙烷