Triterpenoids from the Flower of Campsis grandiflora K. Schum. As Human Acyl-CoA: Cholesterol Acyltransferase Inhibitors

  • Kim, Dong-Hyun (Graduate School of Biotechnology & Plant Metabolism Research Center, Kyung Hee University) ;
  • Han, Kyung-Min (Graduate School of Biotechnology & Plant Metabolism Research Center, Kyung Hee University) ;
  • Chung, In-Sik (Graduate School of Biotechnology & Plant Metabolism Research Center, Kyung Hee University) ;
  • Kim, Dae-Keun (Department of Pharmacy, Woosuk University) ;
  • Kim, Sung-Hoon (Graduate School of East-West Medical Science, Kyung Hee University) ;
  • Kwon, Byoung-Mog (Korea Research Institute of Bioscience and Biotechnology) ;
  • Jeong, Tae-Sook (Korea Research Institute of Bioscience and Biotechnology) ;
  • Park, Mi-Hyun (Erom life Co. Ltd.) ;
  • Ahn, Eun-Mi (Scigenic Co. Led.) ;
  • Baek, Nam-In (Graduate School of Biotechnology & Plant Metabolism Research Center, Kyung Hee University)
  • 발행 : 2005.01.01

초록

The flower of Campsis grandiflora K. Schum. Was extracted with 80% aqueous MeOH, and the concentrated extract was partitioned with EtOAc, n-BuOH and H$_2$O. From the EtO Ac fraction, seven triterpenoids were isolated through the repeated silica gel, ODS column chromatographies and preparative HPLC. From the result of physico- chemical data including NMR, MS and IR, the chemical structures of the compounds were determined as 3${\beta}$-hydroxyolean-12-en-28-oic acid (oleanolic acid, 1), 3${\beta}$-hydroxyurs-12-en-28-oic acid (ursolic acid, 2), 3${\beta}$-hydroxyurs-12-en-28-al (ursolic aldehyde, 3), 2${\alpha}$,3${\beta}$-dihydroxyolean-12-en-28-oic acid (maslinic acid, 4), 2${\alpha}$,3${\beta}$-dihydroxyurs-12-en-28-oic acid (corosolic acid, 5), 3${\beta}$,23-dihydroxyurs-12- en-28-oic acid (23-hydroxyursolic acid ,6) and 2${\alpha}$,3${\beta}$,23-trihydroxyolean-12-en-28- oic acid (arjunolic acid, 7). These teriterpenoids were isolated for the first time from this plant. Also, compounds 4, 5, 6, and 7 revealed relatively high hACAT-1 inhibitory activity with the value of 46.2${\pm}$1.1, 46.7${\pm}$0.9, 41.5${\pm}$1.3 and 60.8${\pm}$1.1% at the concentration of 100${\mu}$g/mL, respectively.

키워드

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