(7S,9E,11S,12S,13S,14S,15R,16R,17S,18S,26E)-26-{[(4-Cyclopentyl-1-piperazinyl)amino]methylene}-2,15,17,29-tetrahydroxy-11-methoxy-3,7,12,14,16,18,22-heptamethyl-6,23,27-trioxo-8,30-dioxa-24-azatetracy
clo[23.3.1.14,7.05,28]triaconta-1(28),2,4,9,19,21,25(29)-heptaen-13-yl acetate