“…Betulinic acid (BA) is an active natural triterpenoid acid obtained not only from condiments and fruits, such as Rhus tripartium (Ucria) [1], Rosmarinus officinalis L [2], Dillenia indica [3], table olives [4], sour jube fruits [5], apple [6], seasonal fruits [7], but also from many traditional Chinese herbal medicines, such as Rosae Laevigata Michx [8], Paeonia spp [9]. In recent years, BA has attracted increasing attention due to its antitumor, antioxidant, anti-inflammatory, Article Related Abbreviations: BA, Betulinic acid; CDS, calibration delivery system; CMC-Na, carboxyl methyl cellulose; DBS, dynamic background subtraction; HRMS, high-resolution mass spectrometry; IDA, information dependent acquisition; MDF, mass defect filter; MMDF, multiple mass defilter; NLF, neutral loss filter; PIF, product ion filter; TCM, traditional Chinese medicine; XIC, extract ion chromatogram anti-HIV, antiatherogenic, antihyperlipidemic, antidiabetic, and hepatoprotective activities [10][11][12].…”