nan-190 nan-190 nan-190 is a drug and research chemical widely used in scientific studies. it was previously believed to act as a selective 5-ht1a receptor antagonist, but a subsequent discovery showed that it also potently blocks the α2-adrenergic receptor. the new finding has raised significant concerns about studies using nan-190 as a specific serotonin receptor antagonist. nan-190identifiers iupac name 1-(2-methoxyphenyl)-4-(4-phthalimidobutyl)piperazine cas number102392-05-2 y 115388-32-4 (hydrobromide)pubchem cid4431iuphar/bps73chemspider4278 nuniilqe19ctv54chemblchembl8618 ncomptox dashboard (epa)dtxsid3043813 chemical and physical dataformulac23h27n3o3molar mass393.487 g·mol−13d model (jsmol)interactive image smiles o=c1c2ccccc2c(=o)n1ccccn4ccn(cc4)c3ccccc3oc inchi inchi=1s/c23h27n3o3/c1-29-21-11-5-4-10-20(21)25-16-14-24(15-17-25)12-6-7-13-26-22(27)18-8-2-3-9-19(18)23(26)28/h2-5,8-11h,6-7,12-17h2,1h3 nkey:sjdomirmmugqqk-uhfffaoysa-n n ny (what is this?) (verify)