128531-64-6 Cyclon(alpha6),C(delta11)-beta-endorphin (6-17) Org 31318 Org-31318 alpha-Endorphin (sheep), 1-de-L-tyrosine-2-deglycine-3-deglycine-4-de-L-phenylalanine-5-de-L-methionine-11-L-glutamic acid-16a-L-leucine-, cyclic (11-6)-peptide beta-Endorphin (6-17), cyclon(alpha6),C(delta11)-