A. Opioid Analgesics Morphine吗啡 HO H3C--OCO0 B CH CH3 HO H3C--OCO Morphine吗啡 Heroin海因Morphine 吗啡 O N CH3 HO HO O N CH3 H3C OCO H3C OCO Morphine 吗 啡 Heroin 海洛因 A B C D A. Opioid Analgesics