2,3-Difluoro-4-nitroanisole , its cas register number is 66684-59-1. It also can be called 2,3-Difluoro-1-methoxy-4-nitrobenzene ; 2,3-Difluoro-4-nitrophenyl methyl ether ; and Benzene, 2,3-difluoro-1-methoxy-4-nitro- .