Perflexane was developed as an ultrasound contrast agent.

Kyotorphin is an endogenou neuroactive dipeptide with analgesic properties. Kyotorphin possesses anti-inflammatory and antimicrobial activity. Kyotorphin levels in cerebro-spinal fluid correlate negatively with the progression of neurodegeneration in Alzheimer's Disease patients.

Methyl 3-indolecarboxylate is a natural product isolated from Heracleum candicans.