[NH2:1][C:2]1[CH:3]=[C:4]([CH:8]=[CH:9][CH:10]=1)[C:5]([OH:7])=[O:6].[NH2:11][C:12]([NH2:14])=[NH:13].[ClH:15]>>[NH:1]([C:2]1[CH:3]=[C:4]([CH:8]=[CH:9][CH:10]=1)[C:5]([OH:7])=[O:6])[C:12]([NH2:13])=[NH:11].[ClH:15].[NH:13]([C:2]1[CH:3]=[C:4]([CH:8]=[CH:9][CH:10]=1)[C:5]([OH:7])=[O:6])[C:12]([NH2:14])=[NH:11]3-guanidinobenzoic acid was prepared from 3-aminobenzoic acid by the method of Miller, et al., cited in Example 1C. The guanidine was treated with ethereal hydrogen chloride to give 3-guanidino-benzoic acid hydrochloride.
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