CH3I Ag,O excess N HO H CH CH3 CH CH CH3I Ag,O ①D excess N CH CH ⑨DOrganic Chemistry Organic Chemistry Xiamen Xiamen University University N H CH 3 I (excess) N CH 3 CH 3 I Ag 2 O N CH 3 CH 3 HO N CH 3 CH 3 CH 3 I (ex cess) Ag 2 O