TIANFU-CHEM 3,5-Pyridinedicarboxylic acid, 4-(2-ethoxy-6-pentadecylphenyl)-1,4-dihydro-2-methyl-6-[[(5-methyl-1H- benzimidazol-2-yl)thio]methyl]-, 3-methyl 5-(1-methylethyl) ester