172985-43-2 2-Benzoyl-5,5,8-trimethyl-3-(2-furoylamino)-4,5-dihydro-7H-pyrano(4,3-d)furo(2,3-b)pyridine 2-Furancarboxamide, N-(2-benzoyl-8,9-dihydro-5,8,8-trimethyl-6H-furo(2,3-b)pyrano(4,3-d)pyridin-1-yl)-