Synthesis and Evaluation of the Antiproliferative Effects of 1-O-Hexadecyl-2-O- methyl-3-O-(2‘-acetamido-2‘-deoxy-β-d-glucopyranosyl)-sn-glycerol and 1-O-Hexadecyl-2-O-methyl-3-O-(2‘-amino-2‘-deoxy-β-d-glucopyranosyl)-sn-glycerol on Epithelial Cancer Cell Growth