dr-4485 dr-4485 dr-4485 is a compound which acts as a potent and selective antagonist for the 5-ht7 receptor, with good oral bioavailability. it has been used to research the function of this still comparatively little studied serotonin receptor subtype. dr-4485identifiers iupac name 6-chloro-2a-(4-butyl)-2a,3,4,5-tetrahydrobenzindol-2(1h)one cas number402942-53-4 npubchem cid9911844chemspider8087495chemical and physical dataformulac26h28cl2n2omolar mass455.42 g·mol−13d model (jsmol)interactive image smiles c4cc(cl)ccc4c(cc5)=ccn5ccccc2(ccc3)c1c3c(cl)ccc1nc2=o inchi inchi=1s/c26h28cl2n2o/c27-20-7-5-18(6-8-20)19-11-16-30(17-12-19)15-2-1-13-26-14-3-4-21-22(28)9-10-23(24(21)26)29-25(26)31/h5-11h,1-4,12-17h2,(h,29,31)key:sbtrhjholcapft-uhfffaoysa-n