[N:1]1[C:10]2[CH2:9][CH2:8][CH2:7][C:6](=O)[C:5]=2[CH:4]=[CH:3][CH:2]=1.[CH3:12][N:13]([CH:15]([N:19](C)C)[N:16](C)C)C.C(=O)(O)O.NC(N)=N>C1(C)C=CC=CC=1>[N:16]1[C:6]2[C:5]3[CH:4]=[CH:3][CH:2]=[N:1][C:10]=3[CH2:9][CH2:8][C:7]=2[CH:12]=[N:13][C:15]=1[NH2:19]To a refluxing solution, under nitrogen, of 45.0 g (0.306 mol) of 7,8-dihydro-5(6H)-quinolinone, (Example 1), in 750 ml of toluene is added dropwise a solution of 49.8 g (0.343 mol) of tris(dimethylamino)-methane in 250 ml of toluene. The solution is refluxed for 2 hours, cooled and concentrated. The residue is dissolved in 1 l of methanol and treated with 66.2 g (0.367 mol) of guanidine carbonate. The reaction mixture is refluxed, under nitrogen, for 2 hours. The mixture is concentrated to a green solid, the solid is washed with 500 ml of water, filtered and vacuum dried to give 69.1 g of crude product. Recrystallization from acetonitrile affords 6.8 g (77%) of the title compound as a light brown solid; mp 220°-226° C.
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