CAS 1218-34-4 appears in our catalog under these names: N-Acetyl-L-tryptophan, 98%, Tryptophan Related Compound B ( N-Acetyl-L-Tryptophan), N-Acetyl-L-Tryptophan, >95% (HPLC), N-Acetyltryptophan, Ac–Trp–OH. Offered by: Combi-blocks, Chemat Brand, TRC, Mikromol, GLPBio. Available pack sizes: 5g, 100g, 25g, 500g, 1kg, on request, 10g, 25mg.