[C:1]([C:4]1[CH:5]=[C:6]([CH:10]=[CH:11][C:12]=1[OH:13])[C:7](O)=[O:8])(=[O:3])[CH3:2].C(N1C=CN=C1)(N1C=CN=C1)=O.[NH2:26][C:27]([NH2:29])=[NH:28]>>[C:1]([C:4]1[CH:5]=[C:6]([CH:10]=[CH:11][C:12]=1[OH:13])[C:7]([NH:28][C:27]([NH2:29])=[NH:26])=[O:8])(=[O:3])[CH3:2]1.0 eq. of 3-acetyl-4-hydroxybenzoic acid was reacted in accordance with Variant A with 1.1 eq. of carbonyldiimidazole and 5 eq. of guanidine. Colorless crystals, mp 218°-221° C.
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