作者:Jie Liu、Yi-Qian Du、Chuang-Jun Li、Li Li、Fang-You Chen、Jing-Zhi Yang、Nai-Hong Chen、Dong-Ming Zhang
DOI:10.1039/c7ra06753d
日期:——
6R)-clauselansine C (3b), (+)-(1′R,2′R,6′R)-claulansine B (4a), and (+)-(1′R,2′R)-claulansine D (5a), together with twelve known alkaloids (4b, 5b, 6a, 6b, 7a, 7b and 8–13) were isolated from the stems of Clausena lansium. Their structural elucidation and stereochemistry determination were achieved by spectroscopic and chemical methods including 1D and 2D NMR experiments, especially the employment of electronic
八个新生物碱,其中包括三个对对映体的(+) - (2'小号,3' - [R)-clauselansine A(1A)和( - ) - (2' - [R,3' š)-clauselansine A(图1B); (+) - (2'小号,3' - [R)-clauselansine B(图2a)和( - ) - (2' - [R,3'小号)-clauselansine B(图2b); (+)-(3 S,4 R,5 S,6 S)-clauselansine C(3a)和(-)-(3 R,4 S,5 R,6 R)-clauselansine C(3b),(+) - (1' - [R,2' - [R,6' - [R)-claulansine B(图4a),和(+) - (1' - [R,2' - [R)-claulansine d(图5a),加上12从茄子茎中分离到已知生物碱(4b,5b,6a,6b,