8-bromodifuro[2,3-b:2',3'-d]pyridine InChI=1/C9H4BrNO2/c10-6-4-13-9-7(6)8-5(3-11-9)1-2-12-8/h1-4 difuro[2,3-b:2',3'-d]pyridine, 8-bromo-