| http://www.w3.org/ns/prov#value | - atoms. e.g. cyclopentyl, cyclohexyl, phenyl or benzyl; hydroxyl, carboxyl, CN, halogen such as F, Cl or Br, and amino, preferably tertiary amino which may be quaternised with an alkyl halide such as methyl chloride, methyl bromide or methyl iodide, examples of amino groups being methylamino, ethylamino, dimethylamino, diethylamino, pyrrolidyl, piperidyl, piperazyl, morpholyl, N-methylpiperazyl; a
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