3-Pyridinecarboxylic acid,6-[(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]- · CAS 603952-64-3