173156-98-4 3-Pyridinecarboxylic acid, 6-((5,6,7,8-tetrahydro-3,5,5,8,8-pentamethyl-2-naphthalenyl)thio)- 6-((5,6,7,8-Tetrahydro-3,5,5,8,8-pentamethyl-2-naphthyl)thio)nicotinic acid