methyl 4-methyl-5-oxopiperazine-2-carboxylate

methyl 4-methyl-5-phenyl-1,2-oxazole-3-carboxylate

methyl 4-methyl-5-sulfanyl-4H-1,2,4-triazole-3-carboxylate

methyl 4-methyl-6-oxo-1,6-dihydropyridine-3-carboxylate

methyl 4-methyl-6-oxoheptanoate

methyl 4-methyl-6-oxopiperidine-3-carboxylate

methyl 4-methyl-7-azabicyclo[2.2.1]heptane-1-carboxylate hydrochloride

methyl 4-methylazetidine-2-carboxylate hydrochloride

methyl 4-methylbenzene-1-sulfinate

methyl 4-methylbenzene-1-sulfonate

methyl 4-methylbenzoate

methyl 4-methylidenecyclohexane-1-carboxylate

methyl 4-methylidenepiperidine-2-carboxylate hydrochloride

methyl 4-methylmorpholine-3-carboxylate

methyl 4-methylnaphthalene-1-carboxylate

methyl 4-methylpiperazine-2-carboxylate dihydrochloride

methyl 4-methylpiperidine-2-carboxylate hydrochloride

methyl 4-methylpiperidine-4-carboxylate hydrochloride

methyl 4-methylpyrimidine-5-carboxylate

methyl 4-methylquinoline-8-carboxylate

methyl 4-methylthiophene-2-carboxylate

methyl 4-nitro-1,2-oxazole-3-carboxylate

methyl 4-nitro-1,3-thiazole-2-carboxylate

methyl 4-nitro-1H-pyrazole-5-carboxylate

methyl 4-nitro-1H-pyrrole-2-carboxylate

methyl 4-nitro-3-phenylbutanoate

methyl 4-nitrobenzene-1-sulfonate

methyl 4-nitrobenzoate

methyl 4-nitrobutanoate

methyl 4-oxo-1,2,3,4-tetrahydronaphthalene-1-carboxylate

methyl 4-oxo-1,2,3,4-tetrahydronaphthalene-2-carboxylate

methyl 4-oxo-1,2,3,4-tetrahydropyridine-1-carboxylate

methyl 4-oxo-1,4,5,6,7,8-hexahydroquinoline-2-carboxylate hydrochloride

methyl 4-oxo-1,4-dihydroquinoline-2-carboxylate

methyl 4-oxo-1,5-diazecane-7-carboxylate hydrochloride

methyl 4-oxo-1-phenylpiperidine-3-carboxylate

methyl 4-oxo-2,3,4,5-tetrahydro-1H-1,5-benzodiazepine-7-carboxylate

methyl 4-oxo-2-(4-sulfamoylphenyl)-3,4-dihydroquinazoline-7-carboxylate

methyl 4-oxo-2-phenyl-3,4-dihydroquinazoline-7-carboxylate

methyl 4-oxo-3,4-dihydro-2H-1-benzopyran-6-carboxylate

methyl 4-oxo-3,4-dihydro-2H-1-benzopyran-8-carboxylate

methyl 4-oxo-3,4-dihydro-2H-1-benzothiopyran-8-carboxylate

methyl 4-oxo-3,4-dihydrophthalazine-1-carboxylate

methyl 4-oxo-3,4-dihydrophthalazine-5-carboxylate

methyl 4-oxo-3,4-dihydrophthalazine-6-carboxylate