cp-93129 cp-93129 cp-93129 is a drug which acts as a potent and selective serotonin 5-ht1b receptor agonist, with approximately 150x and 200x selectivity over the closely related 5-ht1d and 5-ht1a receptors. it is used in the study of 5-ht1b receptors in the brain, particularly their role in modulating the release of other neurotransmitters. cp-93129identifiers iupac name 3-(1,2,3,6-tetrahydropyridin-4-yl)-1,4-dihydropyrrolopyridin-5-one cas number127792-75-0 ypubchem cid124007iuphar/bps11chemspider110524uniiy4bw369lgscomptox dashboard (epa)dtxsid50155670 chemical and physical dataformulac12h13n3omolar mass215.256 g·mol−13d model (jsmol)interactive image smiles c3cncc=c3c(c1n2)cnc1ccc2=o