CAS 99735-45-2 appears in our catalog under these names: (S)-Methyl 5-oxo-1-((S)-1-phenylethyl)pyrrolidine-3-carboxylate, 95%, (R)-Methyl 5-oxo-1-((R)-1-phenylethyl)pyrrolidine-3-carboxylate, 98+%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 5g, 1g.