Synonyms: 1-Oxa-4,7,10,13,16,19-hexaazacyclodocosane,cyclic peptide deriv.; L-Isoleucine,N-[N-[N-[N-[N-[N-[N-[N-[N-[(R)-3-hydroxy-1-oxodecyl]-L-leucyl]-D-a-glutamyl]-D-allothreonyl]-D-valyl]-L-leucyl]-D-seryl]-L-leucyl]-D-seryl]-,u-lactone;N-[N-[N-[N-[N-[N-[N-[N-[N-[(R)-3-Hydroxy-1-oxodecyl]-L-leucyl]-D-a-glutamyl]-D-allothreonyl]-D-valyl]-L-leucyl]-D-seryl]-L-leucyl]-D-seryl]-L-isoleucineu-lactone