NH2 CH20% CHO OH 腺嘌呤 OH OH 腺苷 CH2OH OH 尿嘧啶 CH2OH D-核糖 OH OH 尿苷 Organic ChemOrganic Chem CHO CH2OH CH2OH OH OH OH O 腺嘌呤 尿嘧啶 CH2OH OH OH O N N N N NH2 CH2OH OH OH O N NH O O D－核糖 腺苷 尿苷