6-chloro-N2-methyl-N4,N8-di-n-propylpyrimido[5,4-d]pyrimidine-2,4,8-triamine 、
C.I.酸性橙108 、 以to yield 2-(6-methylamino-4,8-bis-n-propylamino-pyrimido[5,4-d]pyrimidin-2-yl-amino)-ethanol (32) (200 mg, 72% y)的产率得到2-(6-methylamino-4,8-bis-n-propylamino-pyrimido[5,4-d]pyrimidin-2-yl-amino)-ethanol