N-((3S,4S,6R)-2-(((2R,3R,4S,5R,8R,10S,11R,13R,14R)-2-ethyl-3,4,10-trihydroxy-13-(((2S,4S,5R,6R)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-14-(hydroxymethyl)-3,5,6,8,10,12-hexamethyl-15-oxo-1-oxa-6-azacyclopentadecan-11-yl)oxy)-3-hydroxy-6-methyltetrahydro-2H-pyran-4-yl)-N-methylnitrous amide