tetrahydrofolic

Aminopterin (4-Aminofolic acid) is a synthetic folic acid derivative whose metabolite is a competitive inhibitor of dihydrofolate reductase

Tetrahydrofolic acid (5,6,7,8-tetrahydrofolic acid) is a vitamin B9 derivative that is a common one-carbon donor in organisms and is involved in growth and metabolism.

Tetrahydrofolic acid trihydrochloride (L-5,6,7,8-Tetrahydrofolic acid trihydrochloride) is a biologically active vitamin B9 derivative, a receptor for free formaldehyde, and an effective suicide substrate for mushroom tyrosinase, inhibiting indole ethylamine methylation by methyl-tetrahydrofolate.

(6S)-Tetrahydrofolic acid has 1000 times greater activity in promoting the binding of fluorodeoxyuridine monophosphate with thymidylate synthase compared to the (6R) form and exhibits 600 times higher activity as a growth factor for brewer's yeast (P. cerevisiae). It also has low affinity and high dissociation rates from folate-binding proteins.

5-Methyltetrahydrofolic acid (5-Methyl THF) is a biologically active form of folic acid and a methylated derivative of tetrahydrofolate, serving as the predominant natural dietary folate and the principal form of folate found in plasma and cerebrospinal fluid.

Dihydrofolic acid (7,8-Dihydrofolic acid) is a folic acid derivative that produces tetrahydrofolic acid in the presence of dihydrofolic acid reductase.