1,3-Diethyl-4,5-dimethyl-7-phenylpyrrolo(1H,3H)(3,4-d)pyrimidin-2-one hydrochloride 1H-Pyrrolo(3,4-d)pyrimidin-2(3H)-one, 1,3-diethyl-4,5-dimethyl-7-phenyl-, hydrochloride, hemihydrate 70886-86-1