104568-67-4 3,4-Dihydro-2-nicotinoyloxyethyl-2,5,7,8-tetramethyl-2H-benzopyran-6-yl nicotinate 3-Pyridinecarboxylic acid, 2-(3,4-dihydro-6-((3-pyridinylcarbonyl)oxy)-2,5,7,8-tetramethyl-2H-1-benzopyran-2-yl)ethyl ester