pentethylcyclanone pentethylcyclanone pentethylcyclanone is an antitussive medication having molecular formula c16h25no2 . pentethylcyclanoneclinical dataother namesciclexanona, cyclexanonum, cyclexanoneidentifiers iupac name 2-(cyclopenten-1-yl)-2-(2-morpholin-4-ylethyl)cyclopentan-1-one cas number15301-52-7 ypubchem cid10355398chemspider8530850 yunii2ou4ks37eocomptox dashboard (epa)dtxsid50934664 chemical and physical dataformulac16h25no2molar mass263.381 g·mol−13d model (jsmol)interactive image smiles c1cc=c(c1)c2(cccc2=o)ccn3ccocc3 inchi inchi=1s/c16h25no2/c18-15-6-3-7-16(15,14-4-1-2-5-14)8-9-17-10-12-19-13-11-17/h4h,1-3,5-13h2 ykey:kuoyunplumkqif-uhfffaoysa-n y synthesis pentethylcyclanone can be prepared by alkylation of the anion of the self-condensation product of cyclopentanone with n-(2-chloroethyl)-morpholine. cyclexanone synthesis