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| • | Ethyl 3-morpholin-4-yl-3-oxopropanoate (CAS: 37714-64-0) | • | Ethyl 3-oxo-2,3-dihydrofuro[2,3-b]pyridine-2-carbo... (CAS: 1279893-97-8) | • | Ethyl 3-oxo-3,4-dihydropyrido[2,3-b]pyrazine-2-car... (CAS: 114097-17-5) |
| • | Ethyl 3-Oxo-3-Pyrazin-2-Yl-Propionate (CAS: 62124-77-0) | • | Ethyl 3-oxo-4-(pyrrolidin-1-yl)butanoate hydrochlo... (CAS: 1228070-76-5) | • | Ethyl 3-oxocyclobuantecarboxylate (CAS: 87121-89-9) |
| • | Ethyl 3-Oxocyclohexane-1- Carboxylate (CAS: 33668-25-6) | • | ETHYL 3-OXODODECANOATE (CAS: 67342-99-8) | • | ETHYL 3-OXOPIPERAZINE-1-CARBOXYLATE (CAS: 59701-99-4) |
| • | Ethyl 3-phenoxybenzoate (CAS: 60677-14-7) | • | ethyl 3-phenyl-1H-pyrazole-5-carboxylate (CAS: 13599-12-7) | • | Ethyl 3-phenylisoxazole-5-carboxylate (CAS: 13599-24-1) |
| • | Ethyl 3-pyridylacetate (CAS: 39931-77-6) | • | Ethyl 3-tert-butyl-1H-pyrazole-5-carboxylate (CAS: 916791-97-4) | • | Ethyl 4(1H-indol-3-yl)-2,4-dioxobutanoate (CAS: 51842-50-3) |
| • | Ethyl 4,4-diethoxy-3-oxobutanoate (CAS: 10495-09-7) | • | Ethyl 4,5,6,7-tetrahydro-1H-indazole-5-carboxylate (CAS: 792848-34-1) | • | Ethyl 4,5-Bis(2-Methoxyethoxy)-2-Aminobenzoate (CAS: 179688-27-8) |
| • | Ethyl 4,5-dibromo-1h-imidazole-2-carboxylate (CAS: 74840-99-6) | • | ETHYL 4,5-DIHYDRO-4-OXO-1H-PYRROLO[3,2-D]PYRIMIDIN... (CAS: 853058-41-0) | • | ethyl 4,5-dihydroxy-2-nitrobenzoate (CAS: 773136-83-7) |
| • | Ethyl 4,5-dimethyl-1H-pyrazole-3-carboxylate (CAS: 15803-27-7) | • | ethyl 4,6-dichloro 1,5-naphthyridine 3-carboxylate (CAS: 127094-57-9) | • | Ethyl 4,6-Dichloro-5-Nitronicotinate (CAS: 154012-15-4) |
| • | Ethyl 4,6-dichloroindole-2-carboxylate (CAS: 53995-82-7) | • | ethyl 4,6-dichloropicolinate (CAS: 873450-61-4) | • | Ethyl 4-((4-amino-1H-pyrazol-1-yl)methyl)-5-methyl... (CAS: 1171801-59-4) |
| • | Ethyl 4-(1,2,4-Triazol-1-Yl)benzoate (CAS: 143426-48-6) | • | Ethyl 4-(1H-indol-3-yl)-2,4-dioxobutanoate | • | Ethyl 4-(1H-indol-3-yl)-4-oxobutanoate (CAS: 21859-98-3) |
| • | ethyl 4-(2,5-dichlorobenzyl)piperazine-1-carboxyla... (CAS: 220383-45-9) | • | ethyl 4-(2-chloropyrimidin-4-yl)benzoate (CAS: 499195-60-7) | • | ETHYL 4-(2-NAPHTHYL)-4-OXOBUTYRATE (CAS: 25370-42-7) |
| • | Ethyl 4-(3-cyclopropyl-1H-pyrazol-1-yl)butanoate (CAS: 1170362-12-5) | • | Ethyl 4-(4,4-dimethylpiperidino)benzenecarboxylate | • | ethyl 4-(4-broMophenoxy)butanoate (CAS: 157245-87-9) |
| • | ETHYL 4-(4-BROMOPHENYL)-4-OXOBUTYRATE | • | Ethyl 4-(4-fluorophenyl)-2,4-dioxobutanoate (CAS: 31686-94-9) | • | ethyl 4-(4-formyl-3-hydroxyphenoxy)butanoate (CAS: 152942-06-8) |
| • | ethyl 4-(5-formyl-2-furyl)piperazine-1-carboxylate (CAS: 1175653-32-3) | • | Ethyl 4-(hydroxymethyl)picolinate (CAS: 59663-96-6) | • | ETHYL 4-(METHYLAMINO)-2-(METHYLSULFANYL)-5-PYRIMID... (CAS: 76360-82-2) |
| • | ETHYL 4-(NAPHTHALEN-1-YL)-4-OXOBUTYRATE (CAS: 73931-66-5) | • | ethyl 4-(tert-butoxycarbonylamino)-3-oxobutanoate (CAS: 67706-68-7) | • | ethyl 4-(tert-butyldimethylsilyloxy)cyclohexanecar... (CAS: 676560-15-9) |
| • | ETHYL 4-[(2-AMINO-4-CHLOROPHENYL)AMINO]PIPERIDINE-... (CAS: 53786-45-1) | • | Ethyl 4-Acetylbenzoate (CAS: 38430-55-6) | • | Ethyl 4-Amino-1-Methyl-1h-Imidazole-5-Carboxylate (CAS: 61982-18-1) |
| • | Ethyl 4-amino-1-methyl-1H-pyrazolo[3,4-b]pyridine-... (CAS: 204974-76-5) | • | ETHYL 4-AMINO-2-(METHYLTHIO)-1,3-THIAZOLE-5-CARBOX... (CAS: 39736-29-3) | • | Ethyl 4-amino-2-methylthiazole-5-carboxylate (CAS: 278183-12-3) |
| • | Ethyl 4-amino-3-bromo-5-chlorobenzoate (CAS: 874779-56-3) | • | ETHYL 4-AMINO-3-FLUOROBENZOATE | • | ETHYL 4-AMINO-3-NITROBENZOATE (CAS: 76918-64-4) |
| • | ethyl 4-amino-5-cyano-2-hydroxy-3-methylbenzoate | • | ETHYL 4-AMINOCYCLOHEXANE-1-CARBOXYLATE (CAS: 90950-09-7) | • | Ethyl 4-Aminothiazole-5-carboxylate (CAS: 152300-59-9) |
| • | ethyl 4-benzyloxy-3-hydroxybenzoate (CAS: 177429-27-5) | • | ETHYL 4-BORONO-3-CHLOROBENZOATE (CAS: 913835-94-6) | • | ethyl 4-bromo-1-methyl-1H-pyrazole-5-carboxylate (CAS: 1328640-39-6) |
| • | Ethyl 4-bromo-1-methylimidazole-2-carboxylate (CAS: 1260672-33-0) | • | ETHYL 4-BROMO-1H-PYRROLE-2-CARBOXYLATE (CAS: 433267-55-1) | • | ethyl 4-bromo-1H-pyrrolo[2,3-b]pyridine-2-carboxyl... (CAS: 942920-55-0) |
| • | Ethyl 4-bromo-2-(trifluoromethoxy)benzoate (CAS: 933785-18-3) | • | ethyl 4-bromo-2-fluorobenzoate (CAS: 474709-71-2) | • | Ethyl 4-bromo-3-methoxybenzoate (CAS: 933585-42-3) |
| • | ethyl 4-bromo-5-(trifluoromethyl)-1H-pyrrole-2-car... (CAS: 2055301-68-1) | • | Ethyl 4-Bromo-5-chloropyridine-2-acetate (CAS: 1807012-93-6) | • | Ethyl 4-bromo-5-methyl-1H-imidazole-2-carboxylate (CAS: 1171125-20-4) |
| • | Ethyl 4-bromoimidazo[1,2-a]pyridine-3-acetate (CAS: 1363381-02-5) | • | Ethyl 4-bromooxazole-5-carboxylate (CAS: 1258283-17-8) | • | Ethyl 4-bromothieno[2,3-c]pyridine-2-carboxylate (CAS: 1809004-78-1) |
| • | Ethyl 4-chloro-1,3-dimethyl-1H-pyrazolo[3,4-b]pyri... (CAS: 20481-15-6) | • | ETHYL 4-CHLORO-1-METHYL-1H-PYRAZOLO[3,4-B]PYRIDINE... (CAS: 37801-57-3) | • | Ethyl 4-chloro-2-cyclopropylpyrimidine-5-carboxyla... (CAS: 1044770-40-2) |
| • | Ethyl 4-chloro-2-phenylthiazole-5-carboxylate (CAS: 83983-12-4) | • | Ethyl 4-Chloro-3-Quinolinecarboxylate (CAS: 13720-94-0) | • | ETHYL 4-CHLORO-7-METHYL-1H-INDOLE-2-CARBOXYLATE |
| • | ETHYL 4-CHLORO-7-TRIFLUOROMETHYL-3-CARBOXYLATE (CAS: 21168-42-3) | • | Ethyl 4-chloro-7H-pyrrolo[2,3-d]pyrimidine-5-carbo... (CAS: 144927-57-1) | • | ETHYL 4-CHLORO-7H-PYRROLO[2,3-D]PYRIMIDINE-6-CARBO... |
| • | Ethyl 4-Chloropyridine-3-Carboxylate Hydrochloride (CAS: 174496-99-2) | • | Ethyl 4-Chloroquinazoline-2-Carboxylate (CAS: 34632-69-4) | • | Ethyl 4-cyano-1H-pyrazole-5-carboxylate |
| • | Ethyl 4-Cyclopropyl-1,3-Thiazole-2-Carboxylate (CAS: 439692-05-4) | • | ethyl 4-cyclopropyl-2,4-dioxobutanoate (CAS: 21080-80-8) | • | ETHYL 4-FORMYL-1H-PYRAZOLE-3-CARBOXYLATE (CAS: 179692-09-2) |
| • | Ethyl 4-hydroxy-1-oxa-9-azaspiro[5.5]undecane-9-ca... (CAS: 1785764-72-8) | • | Ethyl 4-hydroxy-1-piperidinecarboxylate (CAS: 65214-82-6) | • | ETHYL 4-HYDROXY-2-OXO-1,2-DIHYDROQUINOLINE-3-CARBO... |
| • | Ethyl 4-hydroxy-5-oxo-1,2-dihydropyrrole-3-carboxy... (CAS: 772317-09-6) | • | ethyl 4-hydroxy-6-(trifluoromethyl)nicotinate (CAS: 1269292-28-5) | • | Ethyl 4-hydroxy-8-(trifluoromethyl)quinoline-3-car... |
| • | Ethyl 4-Hydroxy-8-methoxyquinoline-3-carboxylate (CAS: 27568-04-3) | • | Ethyl 4-hydroxyquinoline-2-carboxylate (CAS: 24782-43-2) | • | Ethyl 4-hydroxyquinoline-7-carboxylate (CAS: 1261629-96-2) |
| • | Ethyl 4-iodo-1H-pyrazole-5-carboxylate (CAS: 179692-08-1) | • | Ethyl 4-Iodobenzoate (CAS: 51934-41-) | • | ethyl 4-methyl-1,3-oxazole-5-carboxylate (CAS: 20485-39-6) |
| • | Ethyl 4-methyl-5-imidazolecarboxylate (CAS: 51605-32-4) |