ethyl 5-(2-ethyl-4-oxoquinazolin-3-yl)-1-phenylpyrazole-4-carboxylate

2-甲基-4-戊烯酸乙酯

2-甲基-3-戊酮

2-乙基-1H-咪唑-4,5-二甲腈

2-ethyl-7-methyl-3-(3-methyl-1,2-oxazol-5-yl)quinazolin-4-one