상기 반응물을 얼음 증류수 400 ml에 천천히 부어주며 반응을 종료 후 유기층을 분리하고, 수세를 2회 반복하였다.
The reaction product was slowly poured into 400 ml of distilled ice water, and after the reaction was completed, the organic layer was separated, and washing with water was repeated twice.