(1S,3E,5S,6S,7R,8S,9R,10R,11S,12S,13E,15Z)-30-{[(E)-(4-cyclopentylpiperazin-1-yl)azanylidene]methyl}-7,11,20,22,29-pentahydroxy-5-methoxy-1,6,8,10,12,16,23-heptamethyl-17,26-dioxo-18-aza-2,25-dioxatetracyclo[17.6.5.021,28.024,27]triaconta-3,13,15,19(20),21(22),23,27(28),29-octaen-9-yl acetate