prov:value
| - 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 (when present) being selected independently for each group B, C, D and E;G is H, OH, Y or O???Y, wherein Y is a substituted or unsubstituted alkyl or alkenyl.
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