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6-Hydroxy-2-naphthaldehyde

2-Hydroxy-1,4-naphoquinone

(Hydroxymethyl)urea

5-Hydroxymethyluracil

3-Hydroxy-alpha-methyl-DL-tyrosine

7-Hydroxy-5-methyl-1,3,4-triazaindolizine

5-Hydroxymethylthiazole

N-Hydroxymethyl-3,4,5,6-tetrahydrophthalimide

3-Hydroxy-2-methyl-4-quinolinecarboxylic acid

(S)-(+)-5-(Hydroxymethyl)-2-pyrrolidinone p-toluenesulfonate