Fluorouracil-13C-15N2;5-Fluoro-2,4(1H,3H)pyrimidinedione-13C,15N2; 2,4-Dihydroxy-5-fluoropyrimidine-13C,15N2; 5-FU-13C,15N2; 5-Fluoropyrimidine-2,4-diol-13C,15N2; Adrucil-13C,15N2; Arumel-13C,15N2; Carac-13C,15N2; Fluorouracil-13C,15N2; Queroplex-13C,15N2; Ro 2-9757-13C,15N2; Timazin-13C,15N2; U 8953-13C,15N2;
