title: [Chemical Constituents from Periplaneta americana].
abstract: OBJECTIVE
  To study the chemical constituents in Periplaneta americana.
  
  
  METHODS
  The chemical constituents were separated and purified by chromatographic methods after solvent extraction and identified by spectroscopic analyses.
  
  
  RESULTS
  Ten compounds were isolated from Periplaneta americana and identified as following: 8-hydroxy-3,4-dihydroquinolin-2 (1H)-one (1), cyclo-( L-Phe-L-Pro) (2), cyclo-(Pro-Ile) (3), cyclo-(L-Pro-D-Leu) (4), brevianamide F (5), cyclo-(Ile-Ala) (6), cyclo-( L-Val-L-Pro) (7), cyclo-(L-Pro-L-Tyr) (8), cyclo-(Trp-Val)-dipeptide (9), and (-)-(1S, 3S)-1-methyl-1,2,3,4-tetrahydro-β-carboline-3-carboxylic acid (10).
  
  
  CONCLUSIONS
  Compounds 2 - 9 are isolated from Periplaneta americana for the first time.
authors.forename: Yang
authors.initials: Y
authors.lastname: Li
authors.forename: Fang
authors.initials: F
authors.lastname: Wang
authors.forename: Pu-zhao
authors.initials: PZ
authors.lastname: Zhang
authors.forename: Ming
authors.initials: M
authors.lastname: Yang
mesh_terms: D000818:Animals; D002243:Carbolines / Q000032:analysis; D004151:Dipeptides / Q000032:analysis; D026121:Indole Alkaloids / Q000032:analysis; D010456:Peptides, Cyclic / Q000032:analysis; D010526:Periplaneta / Q000737:chemistry*; D064209:Phytochemicals / Q000032:analysis* / Q000302:isolation & purification; D010879:Piperazines / Q000032:analysis
chemical_list: D002243:Carbolines; D004151:Dipeptides; D026121:Indole Alkaloids; D010456:Peptides, Cyclic; D064209:Phytochemicals; D010879:Piperazines; C000590722:brevianamide F; C055060:N-valyltryptophan; C085319:maculosin; C092562:prolylisoleucine; C088360:phenylalanylproline; C038114:1-methyl-1,2,3,4-tetrahydro-beta-carboline-3-carboxylic acid