| prov:value
| - eferably having from 2 to 20 carbon atoms, more preferably having from 2 to 12 carbon atoms, and particularly preferably having from 2 to 8 carbon atoms, such as vinyl, allyl, 2-butenyl, and 3-pentenyl), an alkynyl group (preferably having from 2 to 20 carbon atoms, more preferably having from 2 to 12 carbon atoms, and particularly preferably having from 2 to 8 carbon atoms, such as propargyl and
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