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用X射线衍射法测定了标题化合物7-对甲氧-基苯基-9-甲基-1,6-二氮杂螺[4,4]壬酮(C15H20N2O2)的晶体结构,该晶体属三斜晶系:空间群为P1;晶胞参数a=1.03909(9)nm,b=1.08454(10)nm,c=1.35145(16)nm,β=76.502(7)°;V=1.4108(2)nm^3,Z=2;Dx=1.226mg/m^3,F(000)=560.最终偏离因子R=0.0633,ωR^2=0.1829.