Keywords: Norpethidine.png en wikipedia 2011 November 3 Modified version of existing pethidine structure 2007-01-18 Transferred from http //en wikipedia org en wikipedia by Ronhjones Porkchopmcmoose at en wikipedia other versions Porkchopmcmoose Original upload log page en wikipedia Norpethidine png Upload date User Bytes Dimensions Comment 2010-10-07 19 14 UTC D Dinneen 18726 bytes 500×396 <small><nowiki> The skeletal structure of norpethidine An improvement over the http //en wikipedia org/wiki/File Norpethidine svg structure of norpethidine as this structure has fuller bolder bonds/lines between atoms</nowiki></small> 2007-01-18 19 46 UTC Porkchopmcmoose 6047 bytes 1476×954 <small><nowiki>Created in BKChem 0 12 0_pre1 optimized with optipng 0 5 4</nowiki></small> Carboxylate esters Ethyl esters Piperidines Synthetic opioids |