Synonyms: 1H-Pyrrolo[1,2-a][1,4,7,10,13,16,19,22,25,28,31,34,37]tridecaazacyclononatriacontine,cyclic peptide deriv.; Cyclo(L-alanyl-D-a-aspartyl-L-prolyl-D-a-aspartyl-D-g-glutamyl-L-tyrosyl-L-a-aspartyl-L-tyrosyl-L-seryl-D-a-aspartyl-L-leucyl-D-g-glutamyl-D-a-aspartyl)