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Detection and quantification of cyclo-dopa amides in Portulaca oleracea L. by HPLC-DAD and HPLC-ESI-MS/MS
Zezhao Jiao, Haina Wang, Peipei Wang, Hongxiang Sun, Su Yue, Lan Xiang
Journal of Chinese Pharmaceutical Sciences . 2014, (8): 533 -542 .  DOI: 10.5246/jcps.2014.08.069