prov:value
| - an alkenyl group having from 2 to 18, preferably 3 to 12, especially 3 to 6, carbon atoms, a phenylalkyl group having from 7 to 18, preferably 7 to 10, especially 7, carbon atoms optionally substituted by a C1 -C4 -alkyl group, or a cycloalkyl group having from 5 to 12 carbon atoms; and in the case where n is 2, it is an alkylene group having from 2 to 30, preferably 2 to 18, especially 4 to 12, c
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