55599-68-3 A-3309-B Antibiotic A 3302A, 1-(N-acetyl-D-phenylalanine)- Antibiotic A 3302B Antibiotic TL 119 N-Acetylphenylalanylleucylphenylalanylthreonylvalylalanyl-2-amino-2-butenoic acid, lambda-lactone TL 119