A conformational analysis of cycloartenol, 24-methylenecycloartanol and their derivatives was carried out in the solution and the solid state by an NMR study and X-ray crystallographic analysis, respectively. Complete assignments of the 1HNMR spectra of these compounds were made in order to elucidate the conformation involving the ring system and side chain. Rings A to C had a chair-halfchair-boat conformation, and the side ...
[Hart, Elizabeth A.; Hua, Ling; Darr, Lisa B.; Wilson, William K.; Pang, Jihai; Matsuda, Seiichi P. T. Journal of the American Chemical Society, 1999 , vol. 121, # 42 p. 9887 - 9888]