CAS 672-86-6 appears in our catalog under these names: METYROSINE R-ENANTIOMER, (R)-2-Amino-3-(4-hydroxyphenyl)-2-methylpropanoicacid, 98%, 98%, (R)-2-amino-3-(4-hydroxyphenyl)-2-methylpropanoic acid, 95+%. Offered by: Sigma-Aldrich, Chemat, Fluorochem. Available pack sizes: 25MG, 100mg, 250mg, 1g, 5g, 10g.