2-Nitro-7-bromonaphtho(2,1-b)furan 7-Bromo-2-nitronaphtho(2,1-b)furan 75965-73-0 BRN 5748450 NAPHTHO(2,1-b)FURAN, 7-BROMO-2-NITRO- NSC 329224 R 7160 R7160