| prov:value
| - opyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl and the like; X1 is hydrogen, methyl or halo such as chloro, bromo, fluoro and the like; and X2 is methyl or halo such as chloro, bromo, fluoro and the like; or X1 and X2 may be joined to form a hydrocarbylene chain containing from 3 to 4 carbon atoms, for example, trimethylene, tetramethylene, 1,3-butadienylene and the like, and Y is an alkyl
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