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—— ethyl (4S)-6-[[(2R)-2-(dimethylcarbamoyl)pyrrolidin-1-yl]methyl]-4-ethyl-2-oxo-3,4-dihydro-1H-pyrimidine-5-carboxylate —— C17H28N4O4
ethyl (4S)-6-[[(2R)-2-(dimethylcarbamoyl)pyrrolidin-1-yl]methyl]-4-ethyl-2-oxo-3,4-dihydro-1H-pyrimidine-5-carboxylate
—— ethyl (6S)-3-methyl-4-[[(3R)-3-methyl-4-(phenylcarbamoyl)piperazin-1-yl]methyl]-2-oxo-6-(4-propan-2-ylphenyl)-1,6-dihydropyrimidine-5-carboxylate —— C30H39N5O4
ethyl (6S)-3-methyl-4-[[(3R)-3-methyl-4-(phenylcarbamoyl)piperazin-1-yl]methyl]-2-oxo-6-(4-propan-2-ylphenyl)-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6R)-6-(3-chlorophenyl)-2-oxo-4-[[4-(propan-2-ylcarbamoyl)-1,4-diazepan-1-yl]methyl]-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate —— C26H36ClN5O4
ethyl (6R)-6-(3-chlorophenyl)-2-oxo-4-[[4-(propan-2-ylcarbamoyl)-1,4-diazepan-1-yl]methyl]-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6S)-6-(3,4-dichlorophenyl)-3-ethyl-2-oxo-4-[[4-(propylcarbamoyl)piperazin-1-yl]methyl]-1,6-dihydropyrimidine-5-carboxylate —— C24H33Cl2N5O4
ethyl (6S)-6-(3,4-dichlorophenyl)-3-ethyl-2-oxo-4-[[4-(propylcarbamoyl)piperazin-1-yl]methyl]-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6R)-6-(4-methylphenyl)-2-oxo-3-prop-2-enyl-4-[[4-(propylcarbamoyl)-1,4-diazepan-1-yl]methyl]-1,6-dihydropyrimidine-5-carboxylate —— C27H39N5O4
ethyl (6R)-6-(4-methylphenyl)-2-oxo-3-prop-2-enyl-4-[[4-(propylcarbamoyl)-1,4-diazepan-1-yl]methyl]-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6R)-4-[[(3R)-4-(tert-butylcarbamoyl)-3-methylpiperazin-1-yl]methyl]-6-(3-fluorophenyl)-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate —— C27H38FN5O4
ethyl (6R)-4-[[(3R)-4-(tert-butylcarbamoyl)-3-methylpiperazin-1-yl]methyl]-6-(3-fluorophenyl)-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6R)-4-[[(3R)-4-(tert-butylcarbamoyl)-3-methylpiperazin-1-yl]methyl]-6-(4-chlorophenyl)-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate —— C27H38ClN5O4
ethyl (6R)-4-[[(3R)-4-(tert-butylcarbamoyl)-3-methylpiperazin-1-yl]methyl]-6-(4-chlorophenyl)-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate
—— Ethyl 4-hydroxy-6-(4-methoxyphenyl)-2-sulfanylidene-4-(trifluoromethyl)-1,3-diazinane-5-carboxylate —— C15H17F3N2O4S
Ethyl 4-hydroxy-6-(4-methoxyphenyl)-2-sulfanylidene-4-(trifluoromethyl)-1,3-diazinane-5-carboxylate
—— ethyl (6S)-6-(3-fluorophenyl)-2-oxo-3-prop-2-enyl-4-[[4-(propylcarbamoyl)-1,4-diazepan-1-yl]methyl]-1,6-dihydropyrimidine-5-carboxylate —— C26H36FN5O4
ethyl (6S)-6-(3-fluorophenyl)-2-oxo-3-prop-2-enyl-4-[[4-(propylcarbamoyl)-1,4-diazepan-1-yl]methyl]-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6R)-4-[[4-(cyclopropanecarbonyl)-1,4-diazepan-1-yl]methyl]-6-(4-methylphenyl)-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate —— C27H36N4O4
ethyl (6R)-4-[[4-(cyclopropanecarbonyl)-1,4-diazepan-1-yl]methyl]-6-(4-methylphenyl)-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6R)-3-methyl-2-oxo-4-[[4-(phenylcarbamoyl)-1,4-diazepan-1-yl]methyl]-6-(4-propan-2-ylphenyl)-1,6-dihydropyrimidine-5-carboxylate —— C30H39N5O4
ethyl (6R)-3-methyl-2-oxo-4-[[4-(phenylcarbamoyl)-1,4-diazepan-1-yl]methyl]-6-(4-propan-2-ylphenyl)-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6S)-6-(3-chlorophenyl)-3-methyl-4-[[(3R)-3-methyl-4-(phenylcarbamoyl)piperazin-1-yl]methyl]-2-oxo-1,6-dihydropyrimidine-5-carboxylate —— C27H32ClN5O4
ethyl (6S)-6-(3-chlorophenyl)-3-methyl-4-[[(3R)-3-methyl-4-(phenylcarbamoyl)piperazin-1-yl]methyl]-2-oxo-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6R)-6-(3-chlorophenyl)-4-[[(3R)-3-methyl-4-(propan-2-ylcarbamoyl)piperazin-1-yl]methyl]-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate —— C26H36ClN5O4
ethyl (6R)-6-(3-chlorophenyl)-4-[[(3R)-3-methyl-4-(propan-2-ylcarbamoyl)piperazin-1-yl]methyl]-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6S)-4-[[4-(tert-butylcarbamoyl)-1,4-diazepan-1-yl]methyl]-6-(3-fluorophenyl)-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate —— C27H38FN5O4
ethyl (6S)-4-[[4-(tert-butylcarbamoyl)-1,4-diazepan-1-yl]methyl]-6-(3-fluorophenyl)-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6R)-6-(3-methylphenyl)-2-oxo-3-prop-2-enyl-4-[[4-(propylcarbamoyl)-1,4-diazepan-1-yl]methyl]-1,6-dihydropyrimidine-5-carboxylate —— C27H39N5O4
ethyl (6R)-6-(3-methylphenyl)-2-oxo-3-prop-2-enyl-4-[[4-(propylcarbamoyl)-1,4-diazepan-1-yl]methyl]-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6S)-4-[[(3R)-4-(tert-butylcarbamoyl)-3-methylpiperazin-1-yl]methyl]-6-(4-chlorophenyl)-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate —— C27H38ClN5O4
ethyl (6S)-4-[[(3R)-4-(tert-butylcarbamoyl)-3-methylpiperazin-1-yl]methyl]-6-(4-chlorophenyl)-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6S)-6-(3,4-dichlorophenyl)-3-ethyl-2-oxo-4-[[4-(propan-2-ylcarbamoyl)piperazin-1-yl]methyl]-1,6-dihydropyrimidine-5-carboxylate —— C24H33Cl2N5O4
ethyl (6S)-6-(3,4-dichlorophenyl)-3-ethyl-2-oxo-4-[[4-(propan-2-ylcarbamoyl)piperazin-1-yl]methyl]-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6R)-6-(3-fluorophenyl)-4-[[(3R)-3-methyl-4-(thiophene-2-carbonyl)piperazin-1-yl]methyl]-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate —— C27H31FN4O4S
ethyl (6R)-6-(3-fluorophenyl)-4-[[(3R)-3-methyl-4-(thiophene-2-carbonyl)piperazin-1-yl]methyl]-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6S)-4-[[4-(tert-butylcarbamoyl)-1,4-diazepan-1-yl]methyl]-6-(4-chlorophenyl)-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate —— C27H38ClN5O4
ethyl (6S)-4-[[4-(tert-butylcarbamoyl)-1,4-diazepan-1-yl]methyl]-6-(4-chlorophenyl)-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6S)-6-(4-chlorophenyl)-4-[[(3R)-3-methyl-4-(propan-2-ylcarbamoyl)piperazin-1-yl]methyl]-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate —— C26H36ClN5O4
ethyl (6S)-6-(4-chlorophenyl)-4-[[(3R)-3-methyl-4-(propan-2-ylcarbamoyl)piperazin-1-yl]methyl]-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6S)-6-(4-chlorophenyl)-2-oxo-4-[[4-(propan-2-ylcarbamoyl)-1,4-diazepan-1-yl]methyl]-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate —— C26H36ClN5O4
ethyl (6S)-6-(4-chlorophenyl)-2-oxo-4-[[4-(propan-2-ylcarbamoyl)-1,4-diazepan-1-yl]methyl]-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6S)-4-[[(3R)-4-(tert-butylcarbamoyl)-3-methylpiperazin-1-yl]methyl]-6-(3-fluorophenyl)-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate —— C27H38FN5O4
ethyl (6S)-4-[[(3R)-4-(tert-butylcarbamoyl)-3-methylpiperazin-1-yl]methyl]-6-(3-fluorophenyl)-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate
—— Ethyl 2-[(2,2-dichloro-1-methylcyclopropanecarbonyl)carbamothioylamino]-4-ethyl-5-methylthiophene-3-carboxylate —— C16H20Cl2N2O3S2
Ethyl 2-[(2,2-dichloro-1-methylcyclopropanecarbonyl)carbamothioylamino]-4-ethyl-5-methylthiophene-3-carboxylate
—— ethyl (6S)-6-(3-methylphenyl)-2-oxo-3-prop-2-enyl-4-[[4-(propylcarbamoyl)-1,4-diazepan-1-yl]methyl]-1,6-dihydropyrimidine-5-carboxylate —— C27H39N5O4
ethyl (6S)-6-(3-methylphenyl)-2-oxo-3-prop-2-enyl-4-[[4-(propylcarbamoyl)-1,4-diazepan-1-yl]methyl]-1,6-dihydropyrimidine-5-carboxylate
—— ethyl 4-[2-[(4-chlorobenzoyl)-[[(2R)-oxolan-2-yl]methyl]amino]acetyl]-1-ethyl-3,5-dimethylpyrrole-2-carboxylate —— C25H31ClN2O5
ethyl 4-[2-[(4-chlorobenzoyl)-[[(2R)-oxolan-2-yl]methyl]amino]acetyl]-1-ethyl-3,5-dimethylpyrrole-2-carboxylate
—— ethyl (6R)-6-(3-methylphenyl)-2-oxo-4-[[4-(propan-2-ylcarbamoyl)piperazin-1-yl]methyl]-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate —— C26H37N5O4
ethyl (6R)-6-(3-methylphenyl)-2-oxo-4-[[4-(propan-2-ylcarbamoyl)piperazin-1-yl]methyl]-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate
—— Ethyl 6-(4-{[(2-fluorophenyl)carbamoyl]amino}phenyl)-8-methyl-2H,3H,4H,6H-pyrimido[2,1-B][1,3]thiazine-7-carboxylate —— C24H25FN4O3S
Ethyl 6-(4-{[(2-fluorophenyl)carbamoyl]amino}phenyl)-8-methyl-2H,3H,4H,6H-pyrimido[2,1-B][1,3]thiazine-7-carboxylate
—— ethyl (6S)-6-(3-methylphenyl)-2-oxo-4-[[4-(propan-2-ylcarbamoyl)piperazin-1-yl]methyl]-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate —— C26H37N5O4
ethyl (6S)-6-(3-methylphenyl)-2-oxo-4-[[4-(propan-2-ylcarbamoyl)piperazin-1-yl]methyl]-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate
—— Ethyl 5-[3-(3,4-dihydro-2(1H)-isoquinolinyl)-2-hydroxypropoxy]-2-phenyl-3-benzofurancarboxylate 1009595-20-3 C29H29NO5
Ethyl 5-[3-(3,4-dihydro-2(1H)-isoquinolinyl)-2-hydroxypropoxy]-2-phenyl-3-benzofurancarboxylate
—— ethyl (6R)-6-(2,3-dimethoxyphenyl)-3-ethyl-4-[[4-(ethylcarbamoyl)piperazin-1-yl]methyl]-2-oxo-1,6-dihydropyrimidine-5-carboxylate —— C25H37N5O6
ethyl (6R)-6-(2,3-dimethoxyphenyl)-3-ethyl-4-[[4-(ethylcarbamoyl)piperazin-1-yl]methyl]-2-oxo-1,6-dihydropyrimidine-5-carboxylate
—— ethyl 4-[2-[(4-chlorobenzoyl)-[[(2S)-oxolan-2-yl]methyl]amino]acetyl]-1-ethyl-3,5-dimethylpyrrole-2-carboxylate —— C25H31ClN2O5
ethyl 4-[2-[(4-chlorobenzoyl)-[[(2S)-oxolan-2-yl]methyl]amino]acetyl]-1-ethyl-3,5-dimethylpyrrole-2-carboxylate
—— ethyl (6S)-6-(3-chlorophenyl)-2-oxo-3-prop-2-enyl-4-[[4-(propylcarbamoyl)-1,4-diazepan-1-yl]methyl]-1,6-dihydropyrimidine-5-carboxylate —— C26H36ClN5O4
ethyl (6S)-6-(3-chlorophenyl)-2-oxo-3-prop-2-enyl-4-[[4-(propylcarbamoyl)-1,4-diazepan-1-yl]methyl]-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6R)-4-[[4-(tert-butylcarbamoyl)-1,4-diazepan-1-yl]methyl]-6-(3-fluorophenyl)-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate —— C27H38FN5O4
ethyl (6R)-4-[[4-(tert-butylcarbamoyl)-1,4-diazepan-1-yl]methyl]-6-(3-fluorophenyl)-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6R)-6-(4-chlorophenyl)-2-oxo-4-[[4-(propan-2-ylcarbamoyl)-1,4-diazepan-1-yl]methyl]-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate —— C26H36ClN5O4
ethyl (6R)-6-(4-chlorophenyl)-2-oxo-4-[[4-(propan-2-ylcarbamoyl)-1,4-diazepan-1-yl]methyl]-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6R)-6-(3-chlorophenyl)-2-oxo-3-prop-2-enyl-4-[[4-(propylcarbamoyl)-1,4-diazepan-1-yl]methyl]-1,6-dihydropyrimidine-5-carboxylate —— C26H36ClN5O4
ethyl (6R)-6-(3-chlorophenyl)-2-oxo-3-prop-2-enyl-4-[[4-(propylcarbamoyl)-1,4-diazepan-1-yl]methyl]-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6S)-6-(3-fluorophenyl)-4-[[(3R)-3-methyl-4-(thiophene-2-carbonyl)piperazin-1-yl]methyl]-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate —— C27H31FN4O4S
ethyl (6S)-6-(3-fluorophenyl)-4-[[(3R)-3-methyl-4-(thiophene-2-carbonyl)piperazin-1-yl]methyl]-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6R)-4-[[4-(tert-butylcarbamoyl)-1,4-diazepan-1-yl]methyl]-6-(4-chlorophenyl)-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate —— C27H38ClN5O4
ethyl (6R)-4-[[4-(tert-butylcarbamoyl)-1,4-diazepan-1-yl]methyl]-6-(4-chlorophenyl)-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6S)-6-(3-chlorophenyl)-4-[[(3R)-3-methyl-4-(propylcarbamoyl)piperazin-1-yl]methyl]-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate —— C26H36ClN5O4
ethyl (6S)-6-(3-chlorophenyl)-4-[[(3R)-3-methyl-4-(propylcarbamoyl)piperazin-1-yl]methyl]-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6S)-4-[[4-(cyclobutanecarbonyl)piperazin-1-yl]methyl]-6-(3-methylphenyl)-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate —— C27H36N4O4
ethyl (6S)-4-[[4-(cyclobutanecarbonyl)piperazin-1-yl]methyl]-6-(3-methylphenyl)-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6S)-4-[[4-(cyclopropanecarbonyl)-1,4-diazepan-1-yl]methyl]-6-(4-methylphenyl)-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate —— C27H36N4O4
ethyl (6S)-4-[[4-(cyclopropanecarbonyl)-1,4-diazepan-1-yl]methyl]-6-(4-methylphenyl)-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6S)-6-(3-chlorophenyl)-4-[[(3R)-3-methyl-4-(propan-2-ylcarbamoyl)piperazin-1-yl]methyl]-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate —— C26H36ClN5O4
ethyl (6S)-6-(3-chlorophenyl)-4-[[(3R)-3-methyl-4-(propan-2-ylcarbamoyl)piperazin-1-yl]methyl]-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate
—— ethyl 1-[(3S)-4-(3-methoxybenzoyl)-8-propanoyl-1-oxa-4,8-diazaspiro[4.5]decane-3-carbonyl]piperidine-4-carboxylate —— C27H37N3O7
ethyl 1-[(3S)-4-(3-methoxybenzoyl)-8-propanoyl-1-oxa-4,8-diazaspiro[4.5]decane-3-carbonyl]piperidine-4-carboxylate
—— Ethyl 2-cyano-4-(dimethylamino)-2-(5-methyl-1-benzothien-3-yl)butanoate —— C18H22N2O2S
Ethyl 2-cyano-4-(dimethylamino)-2-(5-methyl-1-benzothien-3-yl)butanoate
—— ethyl (6R)-4-[[4-(tert-butylcarbamoyl)piperazin-1-yl]methyl]-6-(2,3-dimethoxyphenyl)-3-ethyl-2-oxo-1,6-dihydropyrimidine-5-carboxylate —— C27H41N5O6
ethyl (6R)-4-[[4-(tert-butylcarbamoyl)piperazin-1-yl]methyl]-6-(2,3-dimethoxyphenyl)-3-ethyl-2-oxo-1,6-dihydropyrimidine-5-carboxylate
—— ethyl (6R)-6-(4-chlorophenyl)-4-[[(3R)-3-methyl-4-(propan-2-ylcarbamoyl)piperazin-1-yl]methyl]-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate —— C26H36ClN5O4
ethyl (6R)-6-(4-chlorophenyl)-4-[[(3R)-3-methyl-4-(propan-2-ylcarbamoyl)piperazin-1-yl]methyl]-2-oxo-3-prop-2-enyl-1,6-dihydropyrimidine-5-carboxylate
—— Ethyl 4-((4-((2-methylbenzo[d]thiazol-6-yl)carbamoyl)phenyl)sulfonyl)piperazine-1-carboxylate —— C22H24N4O5S2
Ethyl 4-((4-((2-methylbenzo[d]thiazol-6-yl)carbamoyl)phenyl)sulfonyl)piperazine-1-carboxylate
—— Ethyl 2-[[5-[(3-chloroanilino)methyl]-4-(4-methoxyphenyl)-1,2,4-triazol-3-yl]sulfanyl]acetate —— C20H21ClN4O3S
Ethyl 2-[[5-[(3-chloroanilino)methyl]-4-(4-methoxyphenyl)-1,2,4-triazol-3-yl]sulfanyl]acetate
—— ethyl (6S)-6-(4-methylphenyl)-2-oxo-3-prop-2-enyl-4-[[4-(propylcarbamoyl)-1,4-diazepan-1-yl]methyl]-1,6-dihydropyrimidine-5-carboxylate —— C27H39N5O4
ethyl (6S)-6-(4-methylphenyl)-2-oxo-3-prop-2-enyl-4-[[4-(propylcarbamoyl)-1,4-diazepan-1-yl]methyl]-1,6-dihydropyrimidine-5-carboxylate
—— Ethyl 5-(3-chloro-2-methylphenyl)-6a-(4-methylphenyl)-4,6-dioxo-1,3a-dihydropyrrolo[3,4-c]pyrazole-3-carboxylate —— C22H20ClN3O4
Ethyl 5-(3-chloro-2-methylphenyl)-6a-(4-methylphenyl)-4,6-dioxo-1,3a-dihydropyrrolo[3,4-c]pyrazole-3-carboxylate
—— ethyl (6R)-6-(3,4-dichlorophenyl)-3-ethyl-4-[[4-(ethylcarbamoyl)piperazin-1-yl]methyl]-2-oxo-1,6-dihydropyrimidine-5-carboxylate —— C23H31Cl2N5O4
ethyl (6R)-6-(3,4-dichlorophenyl)-3-ethyl-4-[[4-(ethylcarbamoyl)piperazin-1-yl]methyl]-2-oxo-1,6-dihydropyrimidine-5-carboxylate