1-cyclopentyl-4-{[(E)-[(1S,3E,5S,6R,7S,8R,9R,10R,11S,12S,13E,15Z)-7-acetoxy-9,11,20,22,29-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(30),20,22,24(27),28(29)-octaen-30-yl]methylidene]amino}piperazine 1-oxide