prov:value
| - The term (lower) alkyl for the purpose of the present invention is defined as an alkyl group comprised of l to 10 carbon atoms, including for example, methyl, ethyl, n-propyl, isopropyl, n'butyl, isobutyl, t-butyl, npentyl, etc., and the like, but especially methyl, ethyl, n-propyl, isopropyl, n-butyl and isobutyl.
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