Compound as reactive (1)

7,8-dihydroneopterin → 6-(hydroxymethyl)-7,8-dihydropterin + glycolaldehyde

Compound as product (3)

H₂O + 7,8-dihydroneopterin 3'-phosphate → 7,8-dihydroneopterin + phosphate

H₂O + 7,8-dihydroneopterin 2'-phosphate → 7,8-dihydroneopterin + phosphate

7,8-dihydroneopterin 3'-triphosphate + 3 H2O → 7,8-dihydroneopterin + 2 H+ + 3 phosphate

Reversible reaction (2)

7,8-dihydroneopterin + oxygen ↔ 7,8-dihydroxanthopterin + glycolaldehyde + formate + H⁺

7,8-dihydroneopterin ↔ 7,8-dihydromonapterin