1 S79 6-amino-2-[(1-naphthylmethyl)amino]-3,7-dihydro-8h-imidazo[4,5-G]quinazolin-8-one 1.000 2 S98 6-amino-2-[(thiophen-2-ylmethyl)amino]-1,7-dihydro-8h-imidazo[4,5-G]quinazolin-8-one 0.750 3 SAQ 2-[(thiophen-2-ylmethyl)amino]-1,7-dihydro-8h-imidazo[4,5-G]quinazolin-8-one 0.714