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Autofluorescence as a Parameter to Study Pharmaceutical Materials
Published in Victoria Vladimirovna Roshchina, Fluorescence of Living Plant Cells for Phytomedicine Preparations, 2020
Victoria Vladimirovna Roshchina
Terpenoids. Short-wavelength visible emission is also specific to terpenoids—monoterpenes fluoresce beginning from 380–400 nm, sesquiterpenoids have maxima in the 430–460 nm range, and carotenoids fluoresce in green and orange (Roshchina 2008). Exclusively blue fluorescence of cells and secretory cavities occur in Labrador tea, marsh tea, or wild rosemary Ledum palustre L., in whose stems the sesquiterpene alcohol ledol (a pharmaceutical substance) predominates in their fluorescence under UV light (Roshchina et al. 2017b). The emission of stems has maximum of 430–450 nm, where the main blue fluorescence is due to ledol. At excitation by longer-wavelength light, there is no fluorescence.
Chemical composition, enantiomeric analysis and anticholinesterase activity of Lepechinia betonicifolia essential oil from Ecuador
Published in Pharmaceutical Biology, 2022
James Calva, Luis Cartuche, Salomé González, José Vinicio Montesinos, Vladimir Morocho
Several studies on the Lepechinia genus reported heterogeneity of identified compounds, which has not allowed the establishment of a typical metabolic pattern. So far to date, the essential oils of some Lamiaceae, including two species belonging to the genus Lepechinia spp. have been studied (Velasco-Negueruela et al. 1994; Cicció et al. 1999; Acevedo et al. 2005; Borges et al. 2006; Arze et al. 2009; Valarezo et al. 2012; Panamito et al. 2021). Two related studies of EO from L. mutica (Benth) Epling, reported a great variation in the chemical composition. Malagón et al. (2003) identified 54 compounds, among them β-phellandrene (30%), camphene (13%), limonene (8%), 3-carene (6%) and α-pinene (6%) were the most abundant. On the other hand, Ramírez et al. (2018) reported the identification of δ-3-carene (24.23%), eudesm-7(11)-en-4-ol (13.02%), thujopsan-2-α-ol (11.90%), β-pinene (7.96%), valerianol (5.19%), and co-eluting limonene and β-phellandrene (4.47%) as the main constituents. In another study, with a related species from the same geographical location, Gilardoni et al. (2018) reported from L. heteromorpha (Briq) Epling, the identification of 25 constituents, where viridiflorene (27.3%), (E,E)-α-farnesene (1.4%), ledol (21.2%), spirolepechinene and (E)-β-caryophyllene (7.1%), allo-aromadendrene (6.1%) were the main constituents.