2,4(1H,3H)-Pyrimidinedione, 5-(2-bromoethenyl)-1-(5-O-(hydroxy((hydroxy(phosphonooxy)phosphinyl)oxy)phosphinyl)-beta-D-arabinofuranosyl)-, (E)- 5-(2-Bromovinyl)-1-arabinofuranosyluracil 5'-triphosphate 79551-90-9 Brvarafutp