title: Seasonal variation of the chemical constituents from Croton species.
abstract: The terpenes, sterols, alkaloid (glaucine) and alpha-tocopherol show seasonal variation for Croton hemiargyreus hemiargyreus and Croton echinocarpus. The amounts of triterpenes are higher during the tropical summer and in most samples the major sesquiterpene was characterized as caryophyllene. The seasonal variation of glaucine showed a maximum between June and October for C. hemiargyreus, and was present only in January and June in C. echinocarpus.
authors: Instituto de Qímica, Universidade Federal do Rio de Janeiro, Brazil.
authors: A
authors: A
authors: dos Santos Pereira
authors: A C
authors: AC
authors: Fernandes do Amaral
authors: M
authors: M
authors: de Araujo Silva
authors: F R
authors: FR
authors: de Aquino Neto
mesh_terms: D001938:Brazil; D019665:Euphorbiaceae / Q000737:chemistry* / Q000502:physiology*; D008401:Gas Chromatography-Mass Spectrometry; D008519:Medicine, Traditional; D010840:Phytosterols / Q000737:chemistry / Q000302:isolation & purification*; D008517:Phytotherapy; D010946:Plants, Medicinal / Q000737:chemistry* / Q000502:physiology; D012621:Seasons; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*; D014329:Tropical Climate
chemical_list: D010840:Phytosterols; D012717:Sesquiterpenes; D014315:Triterpenes