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Keywords: Norpropoxyphene.png en wikipedia 2011 November 3 2009-03-31 en wikipedia Ronhjones Meodipt at en wikipedia other versions Meodipt Original upload log page en wikipedia Norpropoxyphene png Upload date User Bytes Dimensions Comment 2009-03-31 02 48 UTC Meodipt 12859 bytes 414×366 <small><nowiki>i drew this anyone can use it </nowiki></small> Opioids Secondary amines Carboxylate esters Synthetic opioids |