[N+:1]([C:4]1[CH:5]=[N:6][N:7]2[CH:12]=[C:11]([N+:13]([O-])=O)[CH:10]=[CH:9][C:8]=12)([O-])=O>[Zn].C(O)C.O>[NH2:1][C:4]1[CH:5]=[N:6][N:7]2[CH:12]=[C:11]([NH2:13])[CH:10]=[CH:9][C:8]=12The reduction of 3,6-dinitropyrazolo[1,5-a]pyridine was carried out using zinc in an ethanol/water mixture.
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