H COCH3 dimethyl fumarate(霉克星) CH3O2C H OCH3 〉〈 NHCH2 OH辣椒素 CONCHSh DEETH CO2CH3 CH3O2C H dimethyl fumarate(霉克星) H H O NHCH2 OH OCH3 辣椒素 CON(C2H5 )2 CH3 DEET