1,4-Dihydro-2-(2-ethoxy-5-methoxyphenyl)-4-oxo-6-quinazolinecarboxylic acid 6-Carboxy-2-(2'-ethoxy-5'-methoxyphenyl)-3,4-dihydro-4-oxoquinazoline 6-Quinazolinecarboxylic acid, 1,4-dihydro-2-(2-ethoxy-5-methoxyphenyl)-4-oxo- 68274-52-2