6-((4,4-dimethyl-1-oxidothiochroman-6-yl)ethynyl)nicotinic acid; 6-[2-(3,4-Dihydro-4,4-dimethyl-1-oxido-2H-1-benzothiopyran-6-yl)ethynyl]-3-pyridinecarboxylic Acid; 6-[(3,4-Dihydro-4,4-dimethyl-1-oxido-2H-1-benzothiopyran-‡6-yl)ethynyl]-3-pyridinecarboxylic Acid;
