(12S,15R,16E,18R,19R,21R,23S,24E,26E,28E,30R,34R)-12-[(2R)-1-[(1S,3R)-4-[(2-hydroxyethyl)oxy]-3-methoxycyclohexyl]prop-2-yl]-30-ethoxy-1,18-dihydroxy-19-methoxy-15,17,21,23,29,34-hexamethyl-4-aza-11,35-dioxatricyclo[29.3.1.04,9]pentatriaconta-16,24,26,28-tetraene-2,3,10,14,20-pentaone