sb-204070 sb-204070 sb-204070 is a drug which acts as a potent and selective 5-ht4 serotonin receptor antagonist (or weak partial agonist), and is used for research into the function of this receptor subtype. sb-204070identifiers iupac name (1-butyl-4-piperidinyl)methyl-8-amino-7-chloro-1,4-benzodioxane-5-carboxylate cas number148688-01-1 ypubchem cid121881iuphar/bps256chemspider108731uniidq39gl43sfchemblchembl68131comptox dashboard (epa)dtxsid90164069 chemical and physical dataformulac19h27cln2o4molar mass382.89 g·mol−13d model (jsmol)interactive image smiles nc1c2occoc2c(cc1cl)c(=o)occ3ccn(cccc)cc3 inchi inchi=1s/c19h27cln2o4/c1-2-3-6-22-7-4-13(5-8-22)12-26-19(23)14-11-15(20)16(21)18-17(14)24-9-10-25-18/h11,13h,2-10,12,21h2,1h3key:aoosjyiinxvnhv-uhfffaoysa-n