prov:value
| - X is an oxygen atom or a covalent bond, with the proviso X is not an oxygen atom when A is ???OH; Y is an ester, an ether, a carbamate, a carbonate, or an amide bonding moiety, and is preferably an ether bonding moiety; m is between a lower limit of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20 and an upper limit of 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 1
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