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【摘要】A new layered vanadium oxide {[NH_3(CH_2)_2NH(CH_2)_2NH_3](compound 1)} was synthesized and characterized by elemental analysis, IR spectrometry and single crystal X ray diffraction. The compound crystallizes in a monoclinic space group P2(1)/n with a=1.0254(2) nm, b=0.6739(2) nm, c=1.2400(2) nm, {β=93.88(3)°,} V=0.8549(3) nm~3, Z=2, R_1=0.0366, wR_2=0.1038. Compound 1 consists of two-dimensional mixed-valence vanadium oxide layers parallelling to the bc plane. The anti-tumor activity of the compound was estimated in three human tumor cell lines in vitro.