5-methyl 3-(1-methylethyl) 4-(2-chlorophenyl)-2-methyl-6-[(1E)-3-oxobut-1-en-1-yl]-1,4-dihydropyridine-3,5-dicarboxylate
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3-Isopropyl 5-methyl 4-(2-chlorophenyl)-2-methyl-6-(3-oxo-1-butenyl)-1,4-dihydro-3,5-pyridinedicarboxylate