(E)-1-Phenyl-d5-1-butene is labelled (E)-1-Phenyl-1-butene (P319495) which was used to study olefin oxidation by cytochrome P-450. (E)-1-Phenyl-1-butene (P319495) can be used to synthesize nonracemic allylic amines. It can also be used to prepare aryl oxiranes by direct epoxidation.