CAS 70904-56-2 appears in our catalog under these names: (S)-2-((S)-2-Amino-3-(4-hydroxyphenyl)propanamido)-5-guanidinopentanoic acid, 95%, 95%, Kyotorphin, Kyotorphin, 99.79%, Kyotorphin (Standard). Offered by: Chemat, GLPBio, MedChemExpress. Available pack sizes: 5mg, 10mg, 25mg, 1g, 250mg, 5 mg, 25 mg, 10 mg.