[CH2:1]([C:3]1[NH:7][C:6](=[O:8])[NH:5][C:4]=1[C:9]([OH:11])=[O:10])[CH3:2].[N:12]1([C:17]2[CH:25]=[CH:24][C:20]([C:21]([OH:23])=O)=[CH:19][CH:18]=2)[CH:16]=[CH:15][N:14]=[CH:13]1>[OH-].[Na+]>[C:9](=[O:11])=[O:10].[CH2:1]([C:3]1[NH:7][C:6](=[O:8])[NH:5][C:4]=1[C:21](=[O:23])[C:20]1[CH:19]=[CH:18][C:17]([N:12]2[CH:16]=[CH:15][N:14]=[CH:13]2)=[CH:25][CH:24]=1)[CH3:2]In a manner similar to that described in Example IA react 5-ethyl-2,3-dihydro-2-oxo-1H-imidazole-4-carboxylic acid and 4-(1H-imidazol-1-yl)benzoic acid, dissolve the crude free base in aqueous sodium hydroxide and reprecipitate with carbon dioxide to produce the title compound.
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