DR TIM EVANS / SCIENCE PHOTO LIBRARY DR TIM EVANS / SCIENCE PHOTO LIBRARY
Chemotherapy drug. Computer model of a molecule of the chemotherapy drug folinic acid (marketed as Leucovorin). Atoms are represented as rods and are colour-coded: carbon (yellow), hydrogen (white), oxygen (red) and nitrogen (blue). Folinic acid is a vitamin used in conjunction with the drug fluorouracil to treat bowel cancer. Folinic acid increases the length of time that fluorouracil is active for.
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