ORGANIC CHEMISTRY Chapter l °1773, urea from urine 9 1805, morphine from opium 91818, chlorophyll from leafs 9 1820, 3 alkaloids from plants HO 吗啡 Morph hine HN—C—N H2 Urea H H CH HO Department of Chemistry, Xiamen UniversityORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 1 1773，urea from urine 1805，morphine from opium 1818，chlorophyll from leafs 1820，3 alkaloids from plants HO HO O N H H CH3 H 吗 啡 Morphine H2N C O NH2 Urea