Synonyms: Cyclic(glycyl-L-valyl-L-prolylglycyl-L-valyl-L-prolylglycyl-L-valyl-L-prolylglycyl-L-valyl-L-prolyl);1H,5H,16H,27H-Tetrapyrrolo[1,2-a:1',2'-j:1'',2''-s:1''',2'''-b1][1,4,7,10,13,16,19,22,25,28,31,34]dodecaazacyclohexatriacontine,cyclic peptide deriv.