N,N'-Dimethylguanidine hydrobromide 、
suvanine 以
甲醇 为溶剂,
反应 0.5h,
以70%的产率得到Sulfuric acid mono-[(1R,4aR,4bS,8aS,10aS)-1-(2-furan-3-yl-ethyl)-4b,8,8,10a-tetramethyl-dodecahydro-phenanthren-(2E)-ylidenemethyl] ester; compound with N,N'-dimethyl-guanidine