乙酸酐 、
[(1R,3S,4S,7R,9S,10S,11R,12R,15S)-9,11,12-triacetyloxy-4-hydroxy-10,14,17,17-tetramethyl-6-azatetracyclo[11.3.1.03,10.04,7]heptadec-13-en-15-yl] acetate 生成 [(1R,3S,4S,7R,9S,10S,11R,12R,15S)-6-acetyl-9,11,12-triacetyloxy-4-hydroxy-10,14,17,17-tetramethyl-6-azatetracyclo[11.3.1.03,10.04,7]heptadec-13-en-15-yl] acetate