1-beta-Arabinofuranosyl-5-butyluracil-5'-triphosphate 2,4(1H,3H)-Pyrimidinedione, 5-butyl-1-(5-O-(hydroxy((hydroxy(phosphonooxy)phosphinyl)oxy)phosphinyl)-beta-D-arabinofuranosyl)- 78524-95-5 Ara-butp