Folinic acid
（重定向自Calcium levofolinate）
Folinic acid (BAN) or leucovorin (USAN), generally administered as the calcium or sodium salt (calcium folinate (INN), sodium folinate, leucovorin calcium, leucovorin sodium), is an adjuvant used in cancer chemotherapy involving the drug methotrexate. It is also used in synergistic combination with the chemotherapy agent 5-fluorouracil.