2-Phe-4-nle-23-iodo-tyr-acth (1-38) 79217-48-4 ACTH (1-38), phe(2)-nle(4)-iodo-tyr(23)- ACTH (1-38), phenylalanyl(2)-norleucyl(4)-iodo-tyrosine(23)- Itpn-acth alpha1-38-Corticotropin, 2-L-phenylalanine-4-L-norleucine-23-(3-iodo-L-tyrosine)-31-L-serine-