Synonyms: 1H,12H-Dipyrrolo[2,1-i:2',1'-r][1,4,7,10,13,16,19,22]oxaheptaazacyclopentacosine,cyclic peptide deriv.; Glycine,N-[N-[1-[N-[N-[1-[N-[N-[1-(N-acetyl-N-methyl-L-valyl)-trans-4-methyl-L-prolyl]-N-methyl-L-threonyl]-L-leucyl]-trans-4-methyl-L-prolyl]-L-leucyl]-N-methyl-L-valyl]-L-prolyl]-N-methyl-D-leucyl]-,y-lactone; Grizelimycin;N-[N-[1-[N-[N-[1-[N-[N-[1-(N-Acetyl-N-methyl-L-valyl)-trans-4-methyl-L-prolyl]-N-methyl-L-threonyl]-L-leucyl]-trans-4-methyl-L-prolyl]-L-leucyl]-N-methyl-L-valyl]-L-prolyl]-N-methyl-D-leucyl]glyciney-lactone; NSC 246122