Fig. 3From: Simultaneous determination of various platycosides in Four Platycodon grandiflorum cultivars by UPLC-QTOF/MSSeparation and identification of two isomers, 3′-O-acetyl-polygalacin D (RT: 8.97 min) and 2′-O-acetyl-polygalacin D (RT: 10.79 min), and their molecular structuresBack to article page