(S)-1-phenylethanol dehydrogenase (EC 1.1.1.311, PED) is an enzyme with systematic name (S)-1-phenylethanol:NAD+ oxidoreductase. This enzyme catalyses the following chemical reaction (S)-1-phenylethanol + NAD+ acetophenone + NADH + H+ The enzyme is involved in degradation of ethylbenzene.