ORGANIC CHEMISTRY Chapter 21 H;C OH OH OH OHI C-NH HH OH HO Y HO CH H Z N(CH3)2 Estradiol Tetracyclines 雌二醇 四环素 (Y=C,Z=H; Aureomycin金霉素) (Y=H,Z=OH; terramycin土霉素) Department of Chemistry, Xiamen UniversityORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 21 OH H3C H H H HO Estradiol 雌二醇 O OH C O NH2 O OH HO OH H N(CH3)2 Y CH3Z OH Tetracyclines 四环素 (Y= Cl, Z=H; Aureomycin 金霉素) (Y= H, Z=OH; terramycin 土霉素)