Synonyms: 1,7,13,19,25,31-Hexaoxa-4,10,16,22,28,34-hexaazacyclohexatriacontane,cyclic peptide deriv.; Cyclo(D-alanyl-3-methyl-L-2-hydroxybutanoyl-L-valyl-4-methyl-D-2-hydroxypentanoyl-D-alanyl-3-methyl-L-2-hydroxybutanoyl-L-valyl-4-methyl-D-2-hydroxypentanoyl-D-alanyl-3-methyl-L-2-hydroxybutanoyl-L-valyl-4-methyl-D-2-hydroxypentanoyl)