prov:value
| - ydrocarbon group which has, as R, an alkyl group such as a methyl, ethyl or isopropyl group, an alkenyl group such as a vinyl, 1-propenyl, allyl, isopropenyl or butenyl group, an aryl group such as a phenyl or tolyl group, an alkynyl group such as a propargyl, butynyl or pentynyl group, or an aralkyl group such as a benzyl or p-methylbenzyl group are particularly preferred in that adequate hydroph
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