fluorouracil (5-fu, fu) cancer chemotherapy drug, chemical structure

fluorouracil uracil fu 5fu pyrimidine cancer tumor thymidylate synthase antimetabolite thymidine dna thymineless chemotherapy pancreatic breast colorectal actinic keratoses basal cell carcinoma skin capecitabine capecitabin tegafur carbon hydrogen oxygen nitrogen fluorine molecule atoms atomic model molecular compound composition chemical chemistry bond structure formula circle ring line drawing skeletal