| 4-hydroxy-2-mercapto-5-pyrimidinecarboxylic aci ethyl ester |
| 4-hydroxy-2-mercapto-5-pyrimidinecarboxylic acid ethyl ester |
| 5-carbethoxy-2-thiouracil |
| 5-carbethoxy-2-thio-uraci |
| 2-Thioisoorotic acid ethyl ester |
| Ethyl 2-thiouracil-5-carboxylate |
| 5-Carboethoxy-2-thiouracil |
| 5-Ethoxycarbonyl-2-thiouracil |
