ac-90179 ac-90179 ac-90179 is a piperidine derivative which acts as an inverse agonist at the 5-ht2a serotonin receptor and an antagonist at 5-ht2c. it was developed as a potential antipsychotic but was not pursued for medical applications due to poor oral bioavailability, however it continues to be used as a tool compound in pharmacological research. ac-90179identifiers iupac name 2-(4-methoxyphenyl)-n--n-(1-methylpiperidin-4-yl)acetamide cas number359878-17-4 ypubchem cid9799308chemspider7975073uniih0evx3ps4bchemical and physical dataformulac23h30n2o2molar mass366.505 g·mol−13d model (jsmol)interactive image smiles cc1=cc=c(c=c1)cn(c2ccn(cc2)c)c(=o)cc3=cc=c(c=c3)oc inchi inchi=1s/c23h30n2o2/c1-18-4-6-20(7-5-18)17-25(21-12-14-24(2)15-13-21)23(26)16-19-8-10-22(27-3)11-9-19/h4-11,21h,12-17h2,1-3h3key:ahgnjbstwqosab-uhfffaoysa-n