(4'R,5'R,1''R,2''R,3''R,4''S,5''R)-2-[4'-acetoxy-5'-methyl-6'-phenylhex-1'-yl]-2-[6''-benzyloxy-3'',4''-bis(benzyloxymethyl)-1'',2'',4'',5''-bis(di-O-isopropylidene)-3''-hydroxyhex-1''-yl][1,3]dithiane