[(2S,3S,4R,6R)-6-[[(1R,2R,3R,6R,7S,8S,9R,10R,16S,17E,18R)-9-[(2S,3R,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyloxan-2-yl]oxy-3-ethyl-2-hydroxy-17-hydroxyimino-2,6,8,10,16,18-hexamethyl-13-methylidene-5-oxo-4,11,15-trioxabicyclo[8.5.4]nonadecan-7-yl]oxy]-4-methoxy-2,4-dimethyloxan-3-yl] acetate 在
盐酸 、 titanium(III) chloride 、 ammonium acetate 作用下,
以
甲醇 、
水 为溶剂,
生成
(1R,2R,3R,6R,7S,8S,9R,10R,16S,18R)-9-[(2S,3R,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyloxan-2-yl]oxy-3-ethyl-2,7-dihydroxy-17-imino-2,6,8,10,16,18-hexamethyl-13-methylidene-4,11,15-trioxabicyclo[8.5.4]nonadecan-5-one