172985-37-4 Benzamide, N-(2-benzoyl-8,9-dihydro-5,8,8-trimethyl-6H-furo(2,3-b)pyrano(4,3-d)pyridin-1-yl)- N-(2-Benzoyl-8,9-dihydro-5,8,8-trimethyl-6H-furo(2,3-b)pyrano(4,3-d)pyridin-1-yl)benzamide