5-Hydroxymethyl-2-furancarboxylic acid (Sumiki's acid) is a naturally occurring human metabolite. Sumiki's acid was first identified in the urine of a leukemia patient who was excreting an abnormal amount of its glycine derivative. Sumiki's acid has been found to be a byproduct of the fungus Aspergillus and probably other species of fungi and yeast as well.

3,3′-Bisdemethylpinoresinol, lignin, is a nature product and has MMP-1 inhibitory activity in UVA-irradiated human dermal fibroblasts. 3,3′-Bisdemethylpinoresinol can be isolated from the seeds of Morinda citrifolia.

4-(4-Methoxyphenyl)-2-butanone is an effective lure for the male melon fly.