2,3,16-tri-O-2'-ethoxyacetyl-hemslecin A 、
间氯过氧苯甲酸 以
二氯甲烷 为溶剂,
以82%的产率得到[(2S,3S,5S,6R,8S,9R,10S,13R,14S,16R,17R)-17-[(2R)-6-acetyloxy-2-hydroxy-6-methyl-3-oxoheptan-2-yl]-2,3,16-tris[(2-ethoxyacetyl)oxy]-6-hydroxy-4,4,9,13,14-pentamethyl-11-oxo-2,3,6,7,8,10,12,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-5-yl] 3-chlorobenzoate