1,2,3,6-四氢-1-甲基-2,6-二氧代-5-嘧啶羧酸

2'-deoxy-3-N-methyl-3',5'-di-O-methyl-2'-methyleneuridine

三甲基硅烷基 2-(氟磺酰基)二氟乙酸酯

1-methyl-2-methylsulfanyl-6-oxo-1,6-dihydro-pyrimidine-5-carboxylic acid

3-methyl-5,6-dihydropyrimidine-2,4(1H,3H)-dione