https://www.syu.ac.kr/pharmacy/2008/07/15/%eb%a6%ac%eb%8d%94%ec%8b%ad%eb%b0%b0%ec%96%91-%ec%9b%83%ec%9d%8c%ec%b9%98%eb%a3%8c%ec%82%ac-%eb%a0%88%ed%81%ac%eb%a6%ac%ec%97%90%ec%9d%b4%ec%85%98-%ec%9e%90%ea%b2%a9-%ec%97%b0%ec%88%98/