<unk>  (4-aminopteroic acid), a 4-amino analog of folic acid, is an antineoplastic drug with immunosuppressive properties used in chemotherapy.<unk>  is a synthetic derivative of pterin.<unk>  works as an enzyme inhibitor by competing for the folate binding site of the enzyme dihydrofolate reductase. Its binding affinity for dihydrofolate reductase effectively blocks tetrahydrofolate synthesis. This results in the depletion of nucleotide precursors and inhibition of DNA, RNA, and protein synthesis.
Aminopterin
Tetrahydrobiopterin
Nicotinamide adenine dinucleotide
Pyridoxal phosphate
Hydroquinone
Nicotinamide adenine dinucleotide phosphate
5-Methyltetrahydrofolate
5,10-Methylenetetrahydrofolate