龙州山橙的生物碱类成分研究(2)
3结构鉴定化合物1淡黄色粉末。ESIMS m/z 3510 [M+H]+。1HNMR(CDCl3,500 MHz) δ:369(1H,m,H3a),333(1H,dd,J=180 Hz,90 Hz,H3b),362 (1H,m,H5a),360 (1H,m,H5a),389 (1H,m,H6a),381 (1H,m,H6b),782 (1H,d,J=45 Hz,H9),722 (1H,d,J=75Hz,H10),721 (1H,d,J=75 Hz,H11),690 (1H,d,J=75 Hz,H12),574 (1H,m,H14),592 (1H,d,J=100 Hz,H15),312 (1H,d,J=135 Hz,H17a),265 (1H,d,J=135 Hz,H17b),575 (1H,m,H18a),500 (1H,dd,J=175,105 Hz ......
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