Separation and identification of impurities from intermediates of istradefylline
WANG Yiyun, LÜ Xiaofang, XU Haojie, MENG Zihu, LI Jiarong, XU Zhibin, XUE Min
Chinese Journal of Chromatography . 2021, (4): 430 -436 .  DOI: 10.3724/SP.J.1123.2020.10013