Analysis of Non-Volatile Chemical Constituents of Menthae Haplocalycis Herba by Ultra-High Performance Liquid Chromatography-High Resolution Mass Spectrometry oleh Lu-Lu Xu, Jing-Jing Xu, Kun-Rui Zhong, Zhan-Peng Shang, Fei Wang, Ru-Feng Wang, Le Zhang, Jia-Yu Zhang, Bin Liu