Ob. Abdelhalim et al., RECONFIRMATION OF THE STRUCTURE OF (-RETAMINE FROM LYGOS RAETAM VAR SARCOCARPA BY X-RAY-ANALYSIS()), Phytochemical analysis, 6(6), 1995, pp. 302-305
The structure of (+)-retamine (1), which has been isolated from the ae
rial part of Lygos raetam var. sarcocarpa, has been reconfirmed by spe
ctroscopic methods including two-dimensional nuclear magnetic resonanc
e spectroscopy and x-ray analysis to be (+)-12 alpha-hydroxysparteine.
The configuration of the hydroxyl group at the position 12 in (+)-ret
amine and the intermolecular hydrogen bond in the crystal structure of
(+)-retamine have been established.