Magn Reson Chem. 2013 May;51(5):312-5. doi: 10.1002/mrc.3941. Epub 2013 Feb 28.
des-7'-O-methylroraimine (compound 1) and epi-des-7'-O-methylroraimine (compound 2), two new isomeric bisbenzylisoquinoline alkaloids were isolated and characterized as a mixture from the rhizomes of Cissampelos sympodialis Eichl. The unambiguous structural elucidation of both isomers was performed with the aid of HR-ESI-MS, FT-IR, and NMR techniques including COSY, HMQC, HMBC, and NOESY.
去 7'-O- 甲基山油柑明碱（化合物 1）和表去 7'-O- 甲基山油柑明碱（化合物 2）是从山油柑根茎中分离得到的两种新的异苯并菲里定生物碱，它们互为异构体。通过高分辨电喷雾质谱（HR-ESI-MS）、傅里叶变换红外光谱（FT-IR）以及二维核磁技术（包括 COSY、HMQC、HMBC 和 NOESY）等方法，明确鉴定了这两种异构体的结构。
