CAS 21778-69-8 L-Tyrosylglycylglycine Chemical Report & Database ... : Name: L-Tyrosylglycylglycine: L-Tyrosylglycylglycine; Enkephalin(1-3); Human beta-endorphin(1-3) Synonyms: Enkephalin(1-3); Human beta-endorphin(1-3) Chemical Registry number: 769198035210 ...