title: Morphine: sites of action in guanosine nucleoside pathway.
mesh_terms: D000818:Animals; D001921:Brain / Q000187:drug effects* / Q000378:metabolism; D002851:Chromatography, High Pressure Liquid; D006152:Cyclic GMP / Q000502:physiology*; D006147:Guanine / Q000378:metabolism; D006151:Guanosine / Q000378:metabolism; D006157:Guanosine Monophosphate / Q000378:metabolism; D066298:In Vitro Techniques; D007288:Inosine / Q000378:metabolism; D009020:Morphine / Q000494:pharmacology*; D011188:Potassium / Q000494:pharmacology; D051381:Rats; D019820:Xanthine; D014970:Xanthines / Q000378:metabolism
chemical_list: D014970:Xanthines; D006151:Guanosine; D019820:Xanthine; D007288:Inosine; D006147:Guanine; D009020:Morphine; D006157:Guanosine Monophosphate; D006152:Cyclic GMP; D011188:Potassium