반응 종료 후, 반응온도를 25 ℃로 냉각시키고, 25 ℃의 물 200 ㎖를 반응용액에 서서히 첨가하였다.
After completion of the reaction, the reaction temperature was cooled down to a temperature of 25° C, and 200 ml of water at a temperature of 25° C was slowly added to the reaction solution.