7,8-Dihydrokavain

Kynurenate-7,8-dihydrodiol dehydrogenase

Zeaxanthin 7,8-dioxygenase

7,8-Dihydroneopterin triphosphate

(+)-Benzo(a)pyrene-7,8-dihydrodiol-9,10-epoxide

7,8-dihydroxykynurenate 8,8a-dioxygenase

Sepiapterin reductase (L-threo-7,8-dihydrobiopterin forming)

Kynurenine 7,8-hydroxylase

7,8-Dihydrocannabinol

7,8-didemethyl-8-hydroxy-5-deazariboflavin synthase

Dihydroneopterin aldolase

2-amino-4-hydroxy-6-hydroxymethyldihydropteridine diphosphokinase

Dihydrofolate synthase

Dihydropteroate synthase

Dethiobiotin synthase

8-oxo-dGTP diphosphatase

Linoleate 8R-lipoxygenase

2-phospho-L-lactate transferase

O-dihydroxycoumarin 7-O-glucosyltransferase

9,12-octadecadienoate 8-hydroperoxide 8S-isomerase

GTP cyclohydrolase I

Carotene 7,8-desaturase

Pyrroloquinoline-quinone synthase

Scytalone dehydratase

Sepiapterin reductase

Α-Naphthoflavone

6-carboxytetrahydropterin synthase

6-Pyruvoyltetrahydropterin synthase

GTP cyclohydrolase II

Dihydromethysticin

Protochlorophyllide reductase

Coeloginanthrin

Dihydrobiopterin

Retusin (isoflavone)

2,4-Dinitrophenylmorphine

8-Oxo-2'-deoxyguanosine

4a-hydroxytetrahydrobiopterin dehydratase