(4Z,6E,8S,9S,10R,11R,12R,13S,14R,15S,16E,19S)-1'-[2-(2H3)methyl(2,3,3,3-2H4)propyl]-9,11,30-trihydroxy-15-methoxy-4,8,10,12,14,19,31-heptamethyl-3,20,28-trioxo-2',3',5',6'-tetrahydro-1'H-spiro[18,33-dioxa-2,24,26-triazapentacyclo[17.8.6.022,29.021,32.023,27]tritriaconta-1(27),4,6,16,21(32),22(29),23(24),30-octaene-25,4'-pyridine]-13-yl acetate