Luokka Orgaaniset yhdisteetbulgariaenglantiespanjaesperantohollantiitaliajapanikreikkalatinalatvialiettuanorjaportugalipuolaranskaruotsisaksasuomitanskaturkkitšekkiunkarivenäjäviro

oxyneolignan oxysophocarpine PA padimate paeonine palatinose palmatine palmin palmitin pamoate pamoic acid PAN panaxatriol panisidine pantoic acid pantolactone paracentrone paraconic acid paradichlorobenzene paradol paraformaldehyde paraldehyde paramalic acid paraphenylenediamine pararosaniline paraxanthin paraxanthine parietic acid parigenin parinaric acid parthenolide parvoline patulin paviine

paytine PCN PCP PE pearlash pectenolone pectenoxanthin pectosic acid pedunculagin penicillic acid pentacene pentachlorobiphenyl pentachlorophenol pentacosane pentacrinin pentadecane pentadiene pentadienoic acid pentaerythritol pentaerythritol tetranitrate pentafluoropyridine pentafluorostyrene pentahelicene pentalene pentalongin pentamethylcyclopentadiene pentamethylene pentamethylenediamine pentane pentanediol pentanedithiol pentanoic acid pentanol

pentaphene pentathiophene pentatriacontane pentatriene pentene pentetic acid penthrite pentine pentylamine pentyne pepstatin peracetic peracetic acid perbenzoic acid perchlorobenzene perchlorobenzoic acid perchloromethane perfluorocarbon perfluoropentacene performic acid perhydroisoquinoline perhydrosqualene perimidine persulphocyanogen perthane perylene PEs PES PET PETE petroline peucedanin PEX