In the case of allyl bromides, you may obtain both E and Z isomers due to the possibility of geometric isomerism around the C=C double bond.
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N-[dimethyl(2-propen-1-yl)ammonio]benzoylimide
2-(Pyridin-2-ylsulfanyl)-pentanoic acid (1R,2S,5R)-2-isopropyl-5-methyl-cyclohexyl ester