| http://www.w3.org/ns/prov#value | - h may be substituted by one to three halogen atoms, or a cycloaliphatic alkyl group, or an aryl or aryloxy group each with six or carbon atoms which may be substituted up to 3 times by halogen atoms and/or alkyl or alkoxy groups with one to six carbon atoms, R is a hydrogen atom or a methyl group, X is an oxygen atom
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