Synonyms: Etamycin(7CI); Viridogrisein (6CI);1H-Pyrrolo[2,1-o][1,4,7,10,13,16,19]oxahexaazacyclodocosine, cyclic peptidederiv.; Glycine,N-[N-[N-[N-[cis-4-hydroxy-1-[N-[N-[(3-hydroxy-2-pyridinyl)carbonyl]-L-threonyl]-D-leucyl]-D-prolyl]-N-methylglycyl]-N,4-dimethyl-L-isoleucyl]-L-alanyl]-N-methyl-L-2-phenyl-,u-lactone;N-[N-[N-[N-[cis-4-Hydroxy-1-[N-[N-[(3-hydroxy-2-pyridinyl)carbonyl]-L-threonyl]-D-leucyl]-D-prolyl]-N-methylglycyl]-N,4-dimethyl-L-isoleucyl]-L-alanyl]-N-methyl-L-2-phenylglycineu-lactone; Neoviridogrisein IV;Viridogrisein I