PT-141 (Bremelanotide) is a synthetic melanocortin receptor agonist primarily studied for its activity on the MC4R pathway, which is involved in sexual desire, autonomic arousal, and neuroendocrine signaling.

It is frequently explored in research related to libido modulation, central melanocortin pathways, neurobehavioral responses, and mechanisms affecting sexual motivation and arousal in controlled experimental settings.

This compound is provided as a lyophilized powder.