Synonyms: 1H,5H-Dipyrrolo[1'',2'':4',5';1''',2''':13',14'][1,4,7,10,13,16,19]heptaazacycloheneicosino[1',2':1,5]pyrrolo[2,3-b]indole,cyclic peptide deriv.; Cyclo[glycyl-L-prolyl-L-threonyl-L-leucyl-L-(2a,3ab,8ab)-1,2,3,3a,8,8a-hexahydro-3a-hydroxypyrrolo[2,3-b]indole-2-carbonyl-L-prolyl-L-phenylalanyl]