龙州山橙的生物碱类成分研究(3)
化合物6淡黄色粉末。ESIMS m/z 3213[M+H]+。1HNMR(CDCl3,500 MHz) δ:790(1H,s,H1),378(1H,d,J=186 Hz,H3a),340(1H,dd,J=30,186 Hz,H3b),325(1H,dd,J=12,90Hz,H5a),310(1H,dd,J=78,90 Hz,H5b),230~205(5H,m,H6,17,19),717(1H,d,J=75 Hz,H9),702(1H,t,J=75,78 Hz,H10),719(1H,t,J=75,78Hz,H11),594~591(2H,m,H14,15),092(1H,d,J=72 Hz,H18),360(1H,s,H21) 192 (3H,s,CH3)。13CNMR (CDCl3 ......
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