34409-16-0 Butanamide, N-[1,2-dihydro-2-oxo-1-[2,3,5-tris-O-(1-oxobutyl)-.beta.-D-arabinofuranosyl]-4-pyrimidinyl]- Butyric acid, triester with N-(1-.beta.-D-arabinofuranosyl-1,2-dihydro-2-oxo-4-pyrimidinyl)butyramide NSC138431