| CAS登录号 | 中文名 | 英文名 | 分子结构式 | 分子式 | 详情 | 供应商 |
| 503-83-3 | 1,5-二氢-4-羟基-2H-吡咯-2-酮 | Tetramic acid; 1,5-Dihydro-4-hydroxy-2H-pyrrol-2-one |  | C4H5NO2 | 详情 | 供应商 |
| 503-87-7 | 2-硫代乙内酰脲; 2-硫代海因 | 2-Thiohydantoin; Hydantoin,2-thio- (6CI,7CI,8CI); 2-Thiohydantoin; 2-Thioxo-4-imidazolidinone; 4-Oxo-2-thioxoimidazolidine; Imidazolidin-4-one-2-thione; NSC 11772; Thiohydantoin |  | C3H4N2OS | 详情 | 供应商 |
| 503-88-8 | 3,5-二氨基-1,2,4-三氮唑; 3,5-二亚氨基四氢化三唑; 3,5-二元胺-1,2,4-三唑; 胍唑 | 3,5-diamino-1,3,5-triazole; Guanazole(6CI,7CI,8CI); 3,5-Diamino-1,2,4-triazole; 3,5-Diamino-1H-1,2,4-triazole; 3,5-Diamino-s-triazole; NSC 166592; NSC 167391; NSC 167392; NSC 1895 |  | C2H5N5 | 详情 | 供应商 |
| 503-89-9 | 1,2,4-Triazolidin-3-one,5-thioxo-; Bicarbamimide,1-thio- (6CI); Bicarbamimide, thio- (8CI); s-Triazol-3-ol, 5-mercapto- (6CI); 1,2,4-Triazolidin-5-one-3-thione; 3-Hydroxy-5-mercapto-1,2,4-triazole; 3-Thiourazole; Monothiourazole |  | C2H3N3OS | 详情 | 供应商 | |
| 503-86-6 | 4H-Imidazol-4-one,2-amino-3,5-dihydro-; 2-Imidazolin-4-one,2-amino- (8CI); 4H-Imidazol-4-one, 2-amino-1,5-dihydro- (9CI); Glycocyamidine(6CI,7CI); 2-Imino-4-imidazolidinone; Demethylcreatinine; Guanidinoacetic acid g-lactam |  | C3H5N3O | 详情 | 供应商 |
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