N-[(1S)-1-(Hydroxymethyl)-2-phenylethyl]carbamic Acid 1,1-Dimethylethyl Ester-d5; (2S)-N-tert-Butoxycarbonyl-1-hydroxy-3-phenyl-2-propanamine-d5; (S)-(-)-2-(tert-Butoxycarbonylamino)-3-phenyl-1-propanol-d5; tert-Butyl [(1S)-1-Benzyl-2-hydroxyethyl]carbamate-d5;

Isotope Labelled protected metabolite of L-Phenylalaninol (P319520), an intermediate in the preparation of (R)-Amphetamine (A634240).