prov:value
| - The esters of the present invention are aliphatic (including cyclo-aliphatic), araliphatic, aromatic or heterocyclic esters, in particular the lower aliphatic and phenyl-aliphatic esters, in which the aliphatic group contains 1-6 carbon atoms, such as the methyl-, ethyl-, propyl-, butyl-, isopropyl-, sec.butyl-, phenylethyl-, phenylpropyl-, cinnamyl- or benzyl ester.
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