[(1S,2S,5E,16S,17R,20R,23R,25S,26S,28R,31S,32R,33S)-23,31-diacetyloxy-1-hydroxy-21,25,34,34-tetramethyl-16-(2-methylprop-1-enyl)-14,18,24-trioxo-26-triethylsilyloxy-17-tri(propan-2-yl)silyloxy-3,19,29-trioxa-15-azahexacyclo[20.11.1.02,20.08,13.025,32.028,31]tetratriaconta-5,8,10,12,21-pentaen-33-yl] benzoate 在
吡啶 、
氟化氢吡啶 作用下,
以
乙腈 为溶剂,
以83%的产率得到[(1S,2S,5E,16S,17R,20R,23R,25S,26S,28R,31S,32R,33S)-23,31-diacetyloxy-1,17,26-trihydroxy-21,25,34,34-tetramethyl-16-(2-methylprop-1-enyl)-14,18,24-trioxo-3,19,29-trioxa-15-azahexacyclo[20.11.1.02,20.08,13.025,32.028,31]tetratriaconta-5,8,10,12,21-pentaen-33-yl] benzoate