Synonyms: 3,5-Pyridinedicarboxylicacid, 1,4-dihydro-2,4,6-trimethyl-, diethyl ester (6CI,7CI,8CI,9CI);1,4-Dihydro-2,4,6-trimethyl-3,5-dicarbethoxypyridine;1,4-Dihydro-2,4,6-trimethyl-3,5-pyridinedicarboxylic acid diethyl ester;1,4-Dihydro-3,5-dicarbethoxycollidine;2,4,6-Trimethyl-3,5-diethoxycarbonyl-1,4-dihydropyridine; 3,5-(Diethoxycarbonyl)-1,4-dihydrocollidine;3,5-Bis(ethoxycarbonyl)-1,4-dihydro-2,4,6-trimethylpyridine;3,5-Bis(ethoxycarbonyl)-1,4-dihydrocollidine;3,5-Bis(ethoxycarbonyl)-2,4,6-trimethyl-1,4-dihydropyridine;3,5-Dicarbethoxy-1,4-dihydro-2,4,6-trimethylpyridine; 3,5-Dicarbethoxy-1,4-dihydrocollidine;3,5-Diethoxycarbonyl-1,4-dihydro-2,4,6-trimethylpyridine;3,5-Diethoxycarbonyl-1,4-dihydro-s-collidine; DDC; DDC (porphyrinogen); Diethyl1,4-dihydro-2,4,6-trimethylpyridine-3,5-dicarboxylate; Diethyl2,4,6-trimethyl-1,4-dihydropyridine-3,5-dicarboxylate; NSC 49528; NSC 8910