2-[[2-[bis(2-hydroxyethyl)amino]-4,8-bis(2,2,3,3,4,4,5,5,6,6-decadeuteriopiperidin-1-yl)pyrimido[5,4-d]pyrimidin-6-yl]-(2-hydroxyethyl)amino]ethanol
2-[[2-[bis(2-hydroxyethyl)amino]-4,8-bis(2,2,3,3,4,4,5,5,6,6-decadeuteriopiperidin-1-yl)pyrimido[5,4-d]pyrimidin-6-yl]-(2-hydroxyethyl)amino]ethanol