(2'S,3'S) ethyl 2-O-chloroacetyl-3-O,4-O-[2',3'-dimethoxybutan-2',3'-diyl]-1-thio-α-D-mannopyranoside

ethyl 3,4-di-O-benzyl-6-O-tert-butyldimethylsilyl-1-thio-α-D-mannopyranoside