ethyl ent-16β-isothiocyanobeyeran-19-oate 、
(1S,2S)-(+)-N,N-二甲基环己二胺 以
二氯甲烷 为溶剂,
以89%的产率得到ethyl (1R,4S,5R,9S,10R,13S,14R)-14-[[(1S,2S)-2-(dimethylamino)cyclohexyl]carbamothioylamino]-5,9,13-trimethyltetracyclo[11.2.1.01,10.04,9]hexadecane-5-carboxylate