What is the molecular formula of the molecule identified by 6-(8-carboxy-1-ethyl-3-methyl-2,4-dihydroquinazolin-6-yl)-1-ethyl-3-methyl-2,4-dihydroquinazoline-8-carboxylic acid;1,9-diethyl-3,7-dimethyl-10-sulfo-2,4,6,8-tetrahydropyrimido[5,4-g]quinazoline-5-carboxylic acid;1,9-diethyl-3,7-dimethyl-2,4,6,8-tetrahydropyrimido[5,4-g]quinazolin-10-ol;1,9-diethyl-5-hydroxy-3,7-dimethyl-2,4,6,8-tetrahydropyrimido[5,4-g]quinazoline-10-carboxylic acid;1,9-diethyl-5-hydroxy-3,7-dimethyl-2,4,6,8-tetrahydropyrimido[5,4-g]quinazoline-10-sulfonic acid;1-ethyl-6-(1-ethyl-8-hydroxy-3-methyl-2,4-dihydroquinazolin-6-yl)-3-methyl-2,4-dihydroquinazoline-8-carboxylic acid;1-ethyl-6-(1-ethyl-3-methyl-2,4-dihydroquinazolin-6-yl)-3-methyl-2,4-dihydroquinazolin-8-ol ?