1H-Pyrrole-3-carbonitrile. 5-[2-[(6-chloro-4-quinolinyl)methyl]-7-(cyclopropylmethyl)-4.5.6.7-tetrahydro-5-methyl-4.6-dioxo-2H-pyrazolo[3.4-d]pyrimidin-3-yl]-1-methyl-