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l -Br+ hbr CH COOH CH3COONO (主) 一NO2 HSO (CH3COhO HaPOS Br2 S Br + HBr Cl2 S Cl S Cl Cl + CH3COONO2 S NO2 S SO3H (CH3CO)2O S C CH3 O CH3COOH S NO2 (主 ) + H2SO4 H3PO4
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