N O N O N O N CH3 O N O CH3 CH3 (CH3)2SO4 CH3I NaOH NaOH; H2O H − H H H H H BKChem (CH<sub>3</sub>)<sub>2</sub>SO<sub>4</sub> CH<sub>3</sub>I NaOH NaOH; H<sub>2</sub>O −