prov:value
| - disubstituted vinyl group in which substituents can be selected from the group consisting of methyl, vinyl, fluorine, chlorine and bromine, or both of substituents may form a tetramethylene chain; when R3 is a methyl group, R4 is a methyl group; R5 is a methyl, methoxy, fluorine, chlorine, bromine or 3,4-methylenedioxy group; and n is 1 or 2.
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