1.Dissection Shearing CH3 入 HO HO OH Levorphanol Morphine吗啡 CH2CH=C(CH3)2 CH3 CH3 HO CH3 CH3 COCH2CH3 0= OC2H5 Pentazocine Pethidine MethadoneO HO N H OH CH3 H H A B C D E D C A B HO N CH3 H H A B D CH3 HO N CH2CH=C(CH3)2 H CH3 C N CH3 O OC2H5 A D A N CH3 CH3 H3C COCH2CH3 Morphine Levorphanol Pentazocine Pethidine Methadone 1. Dissection & Shearing 吗啡