(6aS,7R,13S,14R,16R)-16-(((tert-butyldiphenylsilyl)oxy)methyl)-14-cyano-5-hydroxy-9-methoxy-8-(methoxymethoxy)-4,17-dimethyl-6,6a,7,13,14,16-hexahydro-12H-7,13-epiminobenzo[4,5]azocino[1,2-b][1,3]dioxolo[4,5-h]isoquinolin-10-yl trifluoromethanesulfonate