Known as: 5-(2-Ethoxy-5-((4-Ethylpiperazin-1-yl)Sulfonyl)Pyridin-3-yl)-3-Ethyl-2-(2-Methoxyethyl)-2,6-Dihydro-7H-Pyrazolo(4,3-D)Pyrimidin-7-One, 7H-Pyrazolo(4,3-D)Pyrimidin-7-One, 5-(2-Ethoxy-5-((4-Ethyl-1-Piperazinyl)Sulfonyl)-3-Pyridinyl)-3-Ethyl-2,6-Dihydro-2-(2-Methoxyethyl)-