| http://www.w3.org/ns/prov#value | - oxyhydroxyalkyl groups (containing independently substituents on the hydroxyls of the oxyhydroxyalkyl compounds described above or carboxyl derivatives) attached via a carbon or oxygen; these may be Cn H.sub.[(2n+1)-q] Oy Ra q, OCn H.sub.[(2n+1)-q] Oy Ra q or (CH2)n CO2 Ra ; where n is a positive integer or zero, y is zero or a positive integer less than [(2n+1)-q], q is zero or a positive integer
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