(1R,9S,12S,15R,16E,18R,19R,21R,23R,25E,27E,29E,32S,35R)-12-[(2R)-1-[(1S,3R,4R)-4-[(2-hydroxyethyl)oxy]-3-methoxycyclohexyl]prop-2-yl]-24-ethoxy-1,18-dihydroxy-19-methoxy-15,17,21,23,29,35-hexamethyl-4-aza-11,36-dioxatricyclo[30.3.1.04,9]hexatriaconta-16,25,27,29-tetraene-2,3,10,14,20-pentaone