title: [Cyclopeptides from Rubia schumanniana].
abstract: OBJECTIVE
  To separate and identify cyclopeptides of tubers of Rubia schumanniana.
  
  
  METHODS
  The 70% methanol extracts from tubers of Rubia schumanniana were separated and purified by silica gel, RP-18, Sephedax LH-20 and HPLC. Their structures were identified by spectral analysis.
  
  
  RESULTS
  Nine cyclopeptides were separated and identified as RA- II (1), RA-V (2), RA-VIII (3), rubiyunnanin C (4), RA-X (5), RY-II (6), RA- I (7), RA-XIII (8) and RA-XIII-OMe (9), respectively.
  
  
  CONCLUSIONS
  All of nine cyclopeptides were separated from R. schumanniana for the first time.
authors.affiliation: Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China. kuangb2@126.com
authors.forename: Bin
authors.initials: B
authors.lastname: Kuang
authors.forename: Jun-ting
authors.initials: JT
authors.lastname: Fan
authors.forename: Si-meng
authors.initials: SM
authors.lastname: Zhao
authors.forename: Ning-hua
authors.initials: NH
authors.lastname: Tan
mesh_terms: D004365:Drugs, Chinese Herbal / Q000737:chemistry* / Q000302:isolation & purification; D015394:Molecular Structure; D010456:Peptides, Cyclic / Q000032:analysis* / Q000302:isolation & purification; D045470:Rubia / Q000737:chemistry*
chemical_list: D004365:Drugs, Chinese Herbal; D010456:Peptides, Cyclic