Patent ID: 8614314

Claim:
An oligosaccharide comprising disaccharide units, wherein the oligosaccharide is a tetrasaccharide, a hexasaccharide, an octasaccharide, a decasaccharide or a dodecasaccharide, and wherein the identity of each disaccharide unit is independent of the identity of the other disaccharide units within the oligosaccharide, the oligosaccharide comprising the formula: wherein each tetrasaccharide comprises X1, each hexasaccharide comprises X1 and X2, each octasaccharide comprises X1, X2, and X3, each decasaccharide comprises X1, X2, X3, and X4 and each dodecasaccharide comprises X1, X2, X3, and X4; and wherein each of X1, X2, X3 and X4 is independently A or B, and wherein A is wherein R 8 for each occurrence of A or B is independently a hydrogen or an alkyl group; R 5 for each occurrence of A or B is an amine containing protecting group that, independently for each occurrence, allows for either sulfation or acetylation; and wherein R 1 , R 2 , R 6 and R 7 for each occurrence of A or B is independently a protecting group selected from a first protecting group that allows for sulfation and a second protecting group that does not allow for sulfation, and wherein in at least one occurrence of A or B, at least one of R 1 , R 2 , R 6 , and R 7 is the first protecting group and at least one is the second protecting group.