[CH2:1]([N:8]1[C:12]([C:13]2[C:18]([N+:19]([O-])=O)=[CH:17][CH:16]=[CH:15][C:14]=2[O:22][CH3:23])=[N:11][N:10]=[N:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[H][H]>C(O)C.[Pt]>[CH2:1]([N:8]1[C:12]([C:13]2[C:14]([O:22][CH3:23])=[CH:15][CH:16]=[CH:17][C:18]=2[NH2:19])=[N:11][N:10]=[N:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=11-Benzyl-5-(2-methoxy-6-nitrophenyl)-1H-tetrazole (Intermediate 14, 0.14 g) was dissolved in ethanol (5 mL) under a nitrogen atmosphere. Platinum on carbon (10%, 0.01 g) was added and the nitrogen atmosphere was replaced by hydrogen. The mixture was stirred for 18 hours and then filtered through celite. The filtrate was evaporated to dryness to give the title compound as a brown gum (0.12 g).
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