เอสเทอร์

1.http://th.wikipedia.org/wiki/%E0%B9%80%E0%B8%AD%E0%B8%AA%E0%B9%80%E0%B8%97%E0%B8%AD%E0%B8%A3%E0%B9%8C
2.http://web.ku.ac.th/schoolnet/snet5/topic8/ester.html
3.http://www.mandanarumol.ac.th/My%20Website%20mandanarumol/webpang%20Group%20science/%E0%B8%A1.X%20%E0%B8%9D%E0%B8%B2%E0%B8%81%E0%B8%87%E0%B8%B2%E0%B8%99%E0%B8%A5%E0%B8%87web/%E0%B8%A3%E0%B8%B2%E0%B8%A2%E0%B8%87%E0%B8%B2%E0%B8%99%E0%B8%A1.6/%E0%B9%80%E0%B8%AD%E0%B8%AA%E0%B9%80%E0%B8%97%E0%B8%AD%E0%B8%A3%E0%B9%8C.ppt