3,4-Di-O-benzyl DL-threo-Droxidopa-13C2,15N Hydrochloride

L-threo-3-[3,4-Bis(benzyloxy)phenyl)serine-13C2,15N Hydrochloride; beta-Hydroxy-3-(phenylmethoxy)-O-(phenylmethyl)-threo-L-tyrosine-13C2,15N Hydrochloride;