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.

Bafrekalant is a diazabicyclo-substituted imidazo[1,2-a]pyrimidine derivative that can be used to study sleep-related breathing disorders such as obstructive and central sleep apnoea and snoring.

Isorhamnetin 7-O-alpha-L-rhamnoside is a natural product.