70570-56-8 ACTINOMYCIN D 3-PHENYLOXAZINONE L-Valine, N,N'-[(10,12-dimethyl-2-oxo-3-phenyl-2H,6H-1,4-oxazine[3,2-b]phenoxazine-5,7-diyl)dicarbonyl]bis(L-threonyl-D-valyl-L-prolyl-N-methylglycyl-N-methyl-, di-.epsilon.-lactone L-Valine, N,N'-[(10,12-dimethyl-2-oxo-3-phenyl-2H,6H-1,4-oxazino[3,2-b]phenoxazine-5,7-diyl)dicarbonyl]bis[L-threonyl-D-valyl-L-prolyl-N-methylglycyl-N-methyl-, di-.xi.-lactone NSC339281