CAS 831210-89-0 appears in our catalog under these names: Fmoc-L-Kyn-OH, Fmoc-L-Kynurenine 98%, (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-4-(2-aminophenyl)-4-oxobutanoic acid, 98%, 98%, Fmoc-L-Kynurenine, 98%. Offered by: Iris Biotech, Ambeed, Chemat, Fluorochem. Available pack sizes: 1g, 250mg, 500mg, 100mg, 5g.