(6-ethylsulfanyl-2-phenyl-hexahydro-pyrano[3,2-d][1,3]dioxin-7-yl)-carbamic acid 2,2,2-trichloro-ethyl ester

2-{3-acetylamino-2-benzyloxy-6-benzyloxymethyl-5-[2-phenyl-7-(2,2,2-trichloro-ethoxycarbonylamino)-hexahydro-pyrano[3,2-d][1,3]dioxin-6-yloxy]-tetrahydro-pyran-4-yloxy}-propionic acid 2-benzenesulfonyl-ethyl ester