Studies on the natural occurrence of folic acid and the citrovorum factor.
D000963:Antimetabolites; D005492:Folic Acid / Q000031:analogs & derivatives / Q000032:analysis*; D002955:Leucovorin
D000963:Antimetabolites; D005492:Folic Acid; D002955:Leucovorin
FOLIC ACID/derivatives; FOLIC ACID/determination