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3,5-Dihydroxy-4-methylbenzoic acid

5,7-Dihydroxy-4-methylcoumarin

3,6-Dihydroxy-4-methylpyridazine

2,4-Dihydroxy-6-methylpyrimidine

4,6-Dihydroxy-2-methylpyrimidine

4,6-Dihydroxy-2-methythiopyrimidine

N,O-Di(2-hydroxyethyl)-2-amino-5-nitrophenol

N,N-Di(hydroxyethyl)-m-toluidine

2,7-Dihydroxy-9-fluorenone

2,6-Dihydroxy-5-fluoro-3-cyanopyridine