H OOH cHO 利福布汀 利福喷汀 i3C CH3 Ho CH3 R=OCO Streptovaricin C利福布汀 利福喷汀 O O H3C O OH H N O CH3 CH3 CH3 OH R HO HO CH3 OH CH3 HO CH3 Streptovaricin C R' R = COOCH3 R' = OCOCH3 CH3