(3R,4S,5S,6R,7R,9S,11R,12R,13S,14R)-6-
[(2S,3R,4S,6R)-4-dimethylamino-3-hydroxy-
6-methyloxan-2-yl]oxy-14-ethyl-9-fluoro-7,12,
13-trihydroxy-4-[(2R,4R,5S,6S)-5-hydroxy-
4-methoxy-4,6-dimethyloxan-2-yl]oxy-3,5,7,9,
11,13-hexamethyl-1-oxacyclotetradecane-2,10-dione