| http://www.w3.org/ns/prov#value | - The alkyl group may, for example, be a methyl group, an ethyl group, a propyl group, a butyl group or an amyl group or may further be a substituted alkyl group such as a 2-hydroxyethyl group, a 2-sulfoethyl group, a 2-carboxyethyl group, or an alkyl group substituted by e.g. a halogen atom.
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