Synonyms: 22-Oxa-3,6,9,12,15,29-hexaazatetracyclo[14.12.2.218,21.123,27]tritriacontane,cyclic peptide deriv.; (S)-Cyclo(D-alanyl-L-alanyl-N,O-dimethyl-L-tyrosyl-L-alanyl-b-hydroxy-N-methyl-L-tyrosyl-3-hydroxy-N-methyl-L-tyrosyl)cyclic (54®63)-ether;Cyclo(D-alanyl-L-alanyl-N,O-dimethyl-L-tyrosyl-L-alanyl-b-hydroxy-N-methyl-L-tyrosyl-3-hydroxy-N-methyl-L-tyrosyl),cyclic (54®63)-ether, (S)-; NSC 259968