Kaempferol 3-O-(2'''-O-sinapoyl-β-sophoroside) (IMAGE) Technical University of Munich (TUM) Caption This is the structure of kaempferol 3-O-(2'''-O-sinapoyl-β-sophoroside), which is responsible for the bitter taste of canola protein isolates. Credit TUM Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.