title: [A new C-28 nortriterpenoid from fruits of Leonurus japonicus].
abstract: OBJECTIVE
  To study the chemical constituents from the fruits of Leonurus japonicus.
  
  
  METHODS
  The compounds were extracted by 70% methanol, then isolated and purified by column chromatography on silica gel, RP-18, Sephedax LH-20 and HPLC. Their structures were determined on the basis of spectroscopic data and physicochemical property.
  
  
  RESULTS
  Two 28-noroleanane-derived spirocyclic triterpenoids including a new acylated nortriterpenoid were isolated and identified as (17R)-19(18 --> 17)-abeo-2alpha,18beta,23-trihydroxy-3beta-E-feruloyoxy-28-norolean-12-ene (1) and phlomistetraol B (2).
  
  
  CONCLUSIONS
  Compound 1 is a new compound,named as leonujaponin A. Both compounds 1-2 are isolated for the first time from Leonurus plants.
authors.affiliation: State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China.
authors.forename: Yuqing
authors.initials: Y
authors.lastname: Zheng
authors.forename: He
authors.initials: H
authors.lastname: Yan
authors.forename: Jing
authors.initials: J
authors.lastname: Han
authors.forename: Ninghua
authors.initials: N
authors.lastname: Tan
mesh_terms: D002851:Chromatography, High Pressure Liquid; D005638:Fruit / Q000737:chemistry; D031332:Leonurus / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D014315:Triterpenes