N-ac-B-endorphin fragment 1-27;N-AC-B-ENDORPHIN FRAGMENT 1-27, HUMAN;N-Acetyl-β-Endorphin Fragment1-27 Human;N-Acetyl-beta-Endorphin FragMent 1-27 HuMan;beta-endorphin-N-acetyl derivative, human, fragment 1-27;β-Endorphin (sheep), N-acetyl-27-L-tyrosine-28-de-L-lysine-29-de-L-lysine-30-deglycine-31-de-L-glutamine- (9CI)