5,6-Dihydro-5-oxo-pyrazolo(1,5-c)quinazoline-2-carboxylic acid 5,6-Dihydro-5-oxopyrazolo(1,5-c)quinazoline-2-carboxylic acid 57822-77-2 Pyrazolo(1,5-c)quinazoline-2-carboxylic acid, 5,6-dihydro-5-oxo- SQ 12,903