Synonyms: 9,22-Dioxa-28,29-dithia-2,5,12,15,18,25-hexaazabicyclo[12.12.4]triacontane,cyclic peptide deriv.; L-Leucine,N-(2-quinoxalinylcarbonyl)-D-seryl-L-alanyl-N-methyl-L-cysteinyl-N,3-dimethyl-,bimol. (4®1'),(4'®1)-dilactone, cyclic (3®3')-disulfide;N-(2-Quinoxalinylcarbonyl)-D-seryl-L-alanyl-N-methyl-L-cysteinyl-N,3-dimethyl-L-leucinebimol. (4®1'),(4'®1)-dilactone cyclic (3®3')-disulfide