(2R,3R)-1,1-dioxido-2-(propan-2-yl)tetrahydrothiophen-3-yl {(2S,3R)-4-[(3S,4aS,8aS)-3-(tert-butylcarbamoyl)octahydroisoquinolin-2(1H)-yl]-3-hydroxy-1-phenylbutan-2-yl}carbamate