| http://www.w3.org/ns/prov#value | - an alkyl radical of from 1 to 4 carbons, e.g. methyl, or ethyl; A is an alkylene or alkenylene radical having from two to seven carbon atoms, e.g. about four to six carbon atoms, which radical may be substituted with one or more hydroxy, oxo, alkyloxy or alkylcarboxy groups or said alkylene or alkenylene may have one or more enchained oxa or imino radicals; B is a methyl radical or a cycloalkyl r
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