pethidine molecule, meperidine, molecular structure, 3d model van der waals

pethidine meperidine demerol synthetic opioid pain medication phenylpiperidine class analgesics convulsants ethyl esters euphoriants molecule molecular structure chemical formula isolated model c15h21no2 atom medicine chemistry analgesic organic biology medical science hydrogen skeletal addiction relief scientific atomic hormone line sedative pharmacy composition substance compound dependence element