7, 8-Dihydro-14-hydroxy-N-phenethylnorcodeine

7, 8-Dihydro-5, 6-dehydrokawain

7, 8-Dihydro-6-hydroxylumazine

7, 8-Dihydro-7, 8-dihydroxy-12-fluoro-5-methylchrysene

7, 8-Dihydro-7, 8-dihydroxy-5-methylchrysene

7, 8-Dihydro-7, 8-dihydroxybenzo(a)pyrene 9, 10-oxide

7, 8-Dihydro-7-methyl-8-thioxoguanosine

7, 8-Dihydro-8-methyl-2-(methylamino)-7-oxo-6-pteridinecarboxylic acid

7, 8-Dihydrobatrachotoxin A

7, 8-Dihydrobenzo(a)pyrene

7, 8-Dihydrobenzo(a)pyrene-3, 7, 8-triol

7, 8-Dihydrobenzo(c)pyridazino(1, 2-a)cinnoline-6, 9-dione

7, 8-Dihydrobenzo(H)quinoline-7alpha, 8beta-diol

7, 8-Dihydrobiopterin

7, 8-Dihydrodiolnaftifine

7, 8-Dihydroneopterin

7, 8-Dihydropterin

7, 8-Dihydrorhodopsin

7, 8-Dihydrothiazole(3, 2e)hypoxanthine

7, 8-Dihydroxy-2', 4', 5'-trimethoxyisoflavan