UPLC-Q-TOF-MS characterization data from Functional characterization of three flavonoid glycosyltransferases from <i>Andrographis paniculata</i> liYuan LiXin-Lin LaiChang-Jiang-Sheng WangRui-Shan KangLi-Ping MaTing ZhaoZhen-Hua GaoWei HuangLu-Qi 2019 UPLC-Q-TOF-MS characterization data of the three glycosyltransferases catalyzing 14 substrates