prov:value
| - The method of claim 10, wherein the sialic acid precursor has the structure wherein: A is CH2 or NH; B, C, D and E are each independently selected from the group consisting of: H, OH, X, O???CO???X or O???X, wherein X is a substituted or unsubstituted alkyl or alkenyl, X being selected independently for each group B, C and D; G is H, OH, Y, or O???Y wherein Y is a substituted or unsubstituted alky
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