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<正> C14H22N2O8. H2O,Mr = 364. 4, monoclinic,P21/n,a =11.536(2),b= 10. 744(2),c=13. 271(3)A,B=99. 87(2) ,V=1620.5A3,Z=4,Do=1. 47,Dc= 1. 493gcm-3,F(000) = 776,u(MoKa) = 1. 17cm-1.The structure was solved by direct methods and refined to R=0. 059 for 2