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A novel spiro-compound(C20 H15 N2 O3 P) has been synthesized and characterized by means of IR and 1H NMR. Its crystal structure was determined by X-ray diffractometry. The crystal belongs to the monoclinic system, space group P21 /c with a = 9.1628(7), b = 12.9490(7), c = 15.7898(11), β = 103.952(8)o, Mr = 36.08, V = 1818.2(2)3, Z = 4, Dc = 1.382 g/cm3, F(000) = 788, μ = 0.179 mm-1, R = 0.0701 and wR = 0.1513. The preliminary biological test showed that the title compound has activities against Escherichia coli, S.albus, Bacillus subtilis, Staphylocc- ocusaureus and Micrococcus tetragenus with MIC to be 0.038, 0.038, 0.075, 2.48, and 0.15 mg/mL, respectively.  相似文献   
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