[4-(Benzyloxy-diisopropylamino-phosphanyloxy)-cyclohexyl]-carbamic acid benzyl ester

6-((2-(((benzyloxy)(((1r,4r)-4-(((benzyloxy)carbonyl)amino)cyclohexyl)oxy)phosphoryl)oxy)ethyl)carbamoyl)-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-3',6'-diyl bis(2,2-dimethylpropanoate)