para-Nitrophenylpiperazine (pNPP; code name PAL-175) is a monoamine releasing agent of the phenylpiperazine family. It acts specifically as a selective partial serotonin releasing agent, with an EC50 of 19 to 43nM and an Emax of 57%.
The compounds of every Wikipedia article carrying a Chembox or a Drugbox, refreshed daily, with the values their infoboxes give. The pages need JavaScript; the API does not.