prov:value
| - isobutyl, hexyl, octyl, 2-ethylhexyl, dodecyl, octadecyl), a substituted alkyl group having from 1 to 18, more preferably from 1 to 7, and particularly preferably from 1 to 4, carbon atoms [e.g., an alkyl group substituted with the above-described substituent W can be exemplified, preferably an aralkyl group (e.g., benzyl, 2-phenylethyl), a hydroxyalkyl group (e.g., 2-hydroxyethyl, 3-hydroxypropyl
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