the affinities relative to folic acid were 0.5 for 5-methyltetrahydrofolate , 0.25 for 5-formyltetrahydrofolate , 0.08 for 10-ethyl-10-deazaaminopterin , and 0.05 for methotrexate , respectively .
C0016410
folic acid
C0025677
methotrexate