2-Nitro-6-bromo-7-methoxynaphtho(2,1-b)furan 6-Bromo-7-methoxy-2-nitronaphtho(2,1-b)furan 92802-61-4 BRN 5580783 NAPHTHO(2,1-b)FURAN, 6-BROMO-7-METHOXY-2-NITRO- R 7523