1-(2-甲氧基乙基)-1-亚硝基脲

2-thiophen-3-ylethylurea

5-acetyl-4-[2-(difluoromethoxy)phenyl]-6-methyl-3,4-dihydro-1H-pyrimidin-2-one

3,5-二乙酰基-1,4-二氢-2,6-二甲基吡啶

5-乙酰基-6-甲基-3,4-二氢-2(1H)-嘧啶酮