deptropine deptropine deptropine (brontina) also known as dibenzheptropine, is an antihistamine with anticholinergic properties acting at the h1 receptor. it is usually marketed as the citrate salt. deptropineclinical dataatc coder06ax16 (who) identifiers iupac name 3a-cyclohepten-5-yl)oxy]1ah,5ah-tropane cas number604-51-3 2169-75-7pubchem cid16576drugbankdb13466chemspider16735768 yuniiay31301gkgkeggd07404 ychebichebi:50189 ychemblchembl1946186comptox dashboard (epa)dtxsid5048556 echa infocard100.009.154 chemical and physical dataformulac23h27nomolar mass333.475 g·mol−13d model (jsmol)interactive image smiles cn51cc5c(c1)oc3c4ccccc4ccc2ccccc23 inchi inchi=1s/c23h27no/c1-24-18-12-13-19(24)15-20(14-18)25-23-21-8-4-2-6-16(21)10-11-17-7-3-5-9-22(17)23/h2-9,18-20,23h,10-15h2,1h3/t18-,19+,20+ ykey:zwpodsuqwxaznc-pmolbwcysa-n y (verify)