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