prov:value
| - lkyl group; R3 is a hydrogen atom, or an alkyl or phenyl group, each of R4 and R5, which may be the same or different, is a hydrogen atom or an alkyl group; each of Y's, which may be the same or different, is a hydrogen or halogen atom, or an alkyl, haloalkyl, alkoxyl or haloalkoxyl group; R6 is an alkyl, haloalkyl, alkenyl, haloalkenyl, alkynyl, haloalkynyl, alkoxyalkyl, alkylthioalkyl or cycloal
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