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  [ xìng zhì ] xié fāng jié jīng .ir:1765,1700,ms:246;nmr(cdcl3):1.23(d,j=6.5,3h),1.33(s,3h),4.55(m,1h),5.55(d,j=3,1h),6.20(d,j=3,1h),6.15(dd,j=6,1h),7.55(dd,j=6,2,1h)
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