Patent ID: 7888505

Claim:
A 6,7-dihydrobenzimidazo[1,2-c]quinazoline-6-one carboxylic acid and its esters of the general structural formula where R and each R′ are selected independently from the list comprising —H, —CH 3 , —C 2 H 5 , —C 3 H 7 , -iso-C 3 H 7 , —CH 2 CH 2 CH 2 CH 3 , —CH(CH 3 )CH 2 CH 3 , —CH 2 CH(CH 3 )CH 3 and —C(CH 3 ) 3 , n is 1, 2, 3 or 4, Y is a substituent selected independently from the list comprising —CH 3 , —C 2 H 5 , —NO 2 , —Cl, —Br, —F, —CF 3 , —CN, —OH, —OCH 3 , —OC 2 H 5 , —OCOCH 3 , —OCN, —SCN, —NH 2 , —NHCOCH 3 , and z is 0, 1, 2, 3 or 4.