{(1S,2R)-3-[(Benzo[1,3]dioxole-5-sulfonyl)-(6-cyano-2,2-dimethyl-hexyl)-amino]-1-benzyl-2-hydroxy-propyl}-carbamic acid (3R,3aS,6aR)-(hexahydro-furo[2,3-b]furan-3-yl) ester

{(1S,2R)-3-[(Benzo[1,3]dioxole-5-sulfonyl)-(4-dibenzylamino-2,2-dimethyl-butyl)-amino]-1-benzyl-2-hydroxy-propyl}-carbamic acid (3R,3aS,6aR)-(hexahydro-furo[2,3-b]furan-3-yl) ester