2-Butenoic acid, 3-[[1-[(3-acetyl-1,2,3,4-tetrahydro-3,5,12- trihydroxy-10-methoxy-6,11-dioxo-1-naphthacenyl)oxy]- 2,3,6-trideoxy-3-.alpha.-L-lyxo-hexopyranosyl]amino]-, methyl ester Daunorubicin, N-(methyl-2-butenoate) deriv. Enamine daunorubicin deriv. NSC608748