(1R,9S,12R,13E,15S,16S,19R,20Z,23S,25S,26R,27S,29R)-1,16-dihydroxy-12-[(1R,3R,4R)-4-hydroxy-3-methoxycyclohexyl]-25,27-dimethoxy-13,15,21,23,29-pentamethyl-19-(prop-2-enyl)-4-aza-11,30-dioxatricyclo[24.3.1.04,9]triaconta-13,20-diene-2,3,10,18-tetraone