2-Nitro-8,9-dimethoxynaphtho(2,1-b)furan 8,9-Dimethoxy-2-nitronaphtho(2,1-b)furan 92802-62-5 BRN 5585562 NAPHTHO(2,1-b)FURAN, 8,9-DIMETHOXY-2-NITRO- R 7522