Synonyms: Vasoactiveintestinal octacosapeptide (pig), N-acetyl-8-L-glutamicacid-10-(O-methyl-L-tyrosine)-12-L-lysine-17-L-norleucine-19-L-alanine-25-L-asparticacid-26-L-leucine-27-L-lysine-28-L-lysinamide-, cyclic (25®21)-peptide;1,4,7,10,14-Pentaazacycloeicosane, cyclic peptide deriv.; Ro 25-1392