
Mastering analytical challenges for the characterization of pentacyclic triterpene mono- and diesters of Calendula officinalis flowers by non-aqueous C30 HPLC and hyphenation with APCI-QTOF-MS
Keywords: Calendula officinalis; Triterpene mono- and novel diesters; (U)HPLC-APCI-QTOF-MS; non-aqueous RPLC; C30 stationary phase