prov:value
| - referably an alkenyl group having from 2 to 20, more preferably from 2 to 12, and particularly preferably from 2 to 8, carbon atoms, e.g., vinyl, allyl, 2-butenyl, 3-pentenyl), or an alkynyl group (preferably an alkynyl group having from 2 to 20, more preferably from 2 to 12, and particularly preferably from2 to 8, carbon atoms, e.g., propargyl, 3-pentynyl) .
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