(-)-(S)-2-Amino-3-(4-hydroxyphenyl)-2-methylpropionsaeure (-)-alpha-Methyl-L-tyrosine 672-87-7 Demser EINECS 211-599-5 L 588357-0 L-Tyrosine, alpha-methyl-, (-)- METYROSINE MK 781 Metirosina [INN-Spanish] Metirosine Metirosinum [INN-Latin] Metyrosine [USAN]