Rhodamine 123 is a fluorescent dye (λex=503 nm, λem=527 nm). The intensity of R123 fluorescence has a peak at concentration of 50 μM, and decreases to zero at higher concentrations due to self-quenching.

Gymnoside I (compound 1) is a glycosidoxybenzyl 2-isobutylmalic acid. Gymnoside I shows antiallergic activity in passive cutaneous allergic reaction (PCA) in mice. Gymnoside I can be used in research to treat asthma, neurasthenia and chronic hepatitis.

4-Methylumbelliferyl-β-D-glucuronide hydrate is a fluorogenic substrat.