– heme – hemin – porphyrinogens – coproporphyrinogens – uroporphyrinogens – protoporphyrins – uroporphyrins – tolmetin – tetrazoles – cefotetan – losartan – tetrazolium salts – nitroblue tetrazolium – thiazoles – benzothiazoles – dithiazanine – ethoxzolamide – riluzole – saccharin – thiabendazole – chlormethiazole – famotidine – fanft – firefly luciferin – levamisole – niridazole – nizatidine – oxythiamine – rhodanine – ritonavir – sulfathiazoles – tetramisole – thiadiazoles – acetazolamide – benzolamide – methazolamide – timolol – thiamine – fursultiamin – thiamine monophosphate – thiamine pyrophosphate – thiamine triphosphate – thiazolidinediones – triazoles – amitrole – fluconazole – guanazole – itraconazole – trapidil – dioxins – dioxanes – idazoxan – tetrachlorodibenzodioxin – dioxoles – benzodioxoles – piperonyl butoxide – safrole – dioxolanes – furans – 4-butyrolactone – citraconic anhydrides – furaldehyde – lasalocid – maleic anhydrides – monensin – nafronyl – nigericin – nitrofurans – 5-amino-3-((5-nitro-2-furyl)vinyl)-1,2,4-oxadiazole – fanft – furagin – furazolidone – furylfuramide – nifuratel – nifurtimox – nitrofurantoin – nitrofurazone – nitrovin – psoralens – ficusin – khellin – methoxsalen – trioxsalen – ranitidine – lactams – caprolactam – monobactams – aztreonam – moxalactam – oxathiins – carboxin – oxazines – benzoxazines – ifosfamide – morpholines – dextromoramide – molsidomine – moricizine – phenmetrazine – timolol – viloxazine – xamoterol – oxepins – oxocins – piperazines – almitrine – cinnarizine – cyclizine – delavirdine – diethylcarbamazine – dimethylphenylpiperazinium iodide – flunarizine – flupenthixol – hepes – hydroxyzine – cetirizine – 1-(5-isoquinolinesulfonyl)-2-methylpiperazine – itraconazole – ketoconazole – lidoflazine – meclizine – pipecuronium – pipemidic acid – pipobroman – piribedil – prospidium – quipazine – razoxane – thiethylperazine – trazodone – trimetazidine – piperidines – alphaprodine – anabasine – betalains – betacyanins – betaxanthins – biperiden – cisapride – clopamide – cyproheptadine – loratadine – 1-deoxynojirimycin – domperidone – fentanyl – alfentanil – sufentanil – flecainide – fluspirilene – imino pyranoses – indoramin – isonipecotic acids – diphenoxylate – meperidine – promedol – phenoperidine – pirinitramide – ketanserin – ketotifen – lobeline – loperamide – mepivacaine – methylphenidate – minoxidil – nipecotic acids – paroxetine – pempidine – penfluridol – perhexiline – phencyclidine – pipecolic acids – bupivacaine – piperidones – cycloheximide – dexetimide – glutethimide – aminoglutethimide – thalidomide – triacetoneamine-n-oxyl – piperoxan – ritanserin – terfenadine – trihexyphenidyl – pyrans – aurovertins – iridoids – nigericin – pyran copolymer – pyrones – pyrazines – amiloride – pyrazinamide