(1R,9S,12S,15R,16E,19S,21S,22R,23S,25R)-12-[(2S,3S,4E)-5-[(1R,3R,4S)-4-chloro-3-methoxycyclohexyl]-3-hydroxy-4-methylpent-4-en-2-yl]-1-hydroxy-21,23-dimethoxy-15,17,19,25-tetramethyl-4-aza-11,26-dioxatricyclo[20.3.1.04,9]hexacos-16-ene-2,3,10,14-tetraone