C4H9COOH + NH2CH2COOH → C4H8ClCOOH + NH2CH2COOH → C4H8ClCOOH + NH2CH2COONa → C4H8ClCOONa + NH2CH2COONa
C4H9COOH + NH2CH2COOH → C4H8ClCOOH + NH2CH2COOH → C4H8ClCOOH + NH2CH2COONa → C4H8ClCOONa + NH2CH2COONa