piperocaine piperocaine piperocaine is a local anesthetic drug developed in the 1920s and used as its hydrochloride salt for infiltration and nerve blocks. piperocaineclinical dataatc codenoneidentifiers iupac name 3-(2-methylpiperidin-1-yl)propyl benzoate cas number136-82-3 ypubchem cid10782chemspider10326 nuniif66xui6gzlchemblchembl127865 ncomptox dashboard (epa)dtxsid8048315 echa infocard100.004.784 chemical and physical dataformulac16h23no2molar mass261.365 g·mol−13d model (jsmol)interactive image smiles cc1ccccn1cccoc(c2=cc=cc=c2)=o inchi inchi=1s/c16h23no2/c1-14-8-5-6-11-17(14)12-7-13-19-16(18)15-9-3-2-4-10-15/h2-4,9-10,14h,5-8,11-13h2,1h3 nkey:yqkavwcgqqxbgw-uhfffaoysa-n n ny (what is this?) (verify) synthesis synthesis: patent: alkylation between 3-chloropropyl benzoate (1) and pipicoline (2) provides piperocaine (3).