tert-Butyl ethyl 4-ethyl-1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylate

3,5-pyridinedicarboxylicacid, 4-ethyl-1,4-dihydro-2,6-dimethyl-, 3-(1,1-dimethylethyl) 5-ethyl ester ; tert-butyl ethyl 4-ethyl-1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylate ; 3,5-pyridinedicarboxylicacid, 4-ethyl-1,4-dihydro-2,6-dimethyl-, 1,1-dimethylethyl ethyl ester (9ci) ; 4-ethyl-1,4-dihydro-2,6-dimethyl-3,5-pyridinedicarboxylic acid 3-tert-butyl 5-ethyl ester