Synonyms: 57741-91-0;AC1LADON;2,4(1H,3H)-Pyrimidinedione, 5-butyl-1-(2-deoxy-.beta.-D-erythro-pentofuranosyl)-;2,4(1H,3H)-Pyrimidinedione, 5-butyl-1-(2-deoxy-beta-D-erythro-pentofuranosyl)-;5-butyl-1-[(2R,4S,5R)-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]pyrimidine-2,4-dione