2-Phenylalanyl-4-norleucine-acth(1-24) 97773-00-7 ACTH (1-24), phe(2)-nle(4)- Phe(2)-nle(4)-acth(1-24) alpha1-24-Corticotropin, 2-L-phenylalanine-4-L-norleucine-