101931-46-8 2,2-Difluoro-3-difluoromethylene-2,3-dihydronaphtho(1,2-b)furan 2,3-Dihydro-2,2-difluoro-3-difluoromethylenenaphtho(1,2-b)furan NAPHTHO(1,2-b)FURAN, 2,3-DIHYDRO-2,2-DIFLUORO-3-DIFLUOROMETHYLENE-