상기 반응용액에 10% HCl 수용액 50 mL를 첨가하여 반응을 종료하고, 디에틸에테르 50 mL 로 추출하였다.
The reaction was terminated by adding 50 mL of 10% HCl to the reaction solution, and extraction is performed by using 50 mL of diethylether.