在
三氟乙酸 作用下,
生成 (1S,2R,18R,19R,22S,25R,28R,40S)-5,15-dichloro-2-[(2R,4S,5R,6S)-4-[[4-[(E)-2-(4-chlorophenyl)ethenyl]phenyl]methylamino]-5-hydroxy-4,6-dimethyloxan-2-yl]oxy-18,20,23,26,32,35,37,42,44-nonahydroxy-22-(2-hydroxy-2-iminoethyl)-19-[[(2R)-1-hydroxy-4-methyl-2-(methylamino)pentylidene]amino]-48-[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-7,13-dioxa-21,24,27,41,43-pentazaoctacyclo[26.14.2.23,6.214,17.18,12.129,33.010,25.034,39]pentaconta-3,5,8,10,12(48),14,16,20,23,26,29(45),30,32,34(39),35,37,41,43,46,49-icosaene-40-carboxylic acid