title: The proaporphine alkaloids.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D009020:Morphine / Q000096:biosynthesis / Q000494:pharmacology; D010084:Oxidation-Reduction; D010946:Plants, Medicinal / Q000378:metabolism; D013057:Spectrum Analysis; D013237:Stereoisomerism
chemical_list: D009020:Morphine