Computer-aided method for identification of components in essential oils by 13 C NMR spectroscopy

Antitumour Activity of the Microencapsulation of Annona vepretorum Essential Oil

“…RI (retention indices): 1 calculated on an RTx ® ‐5 MS column according to Van den Dool and Kratz , based on a homologous series of normal alkanes; 2 according to Adams ; 3 according to Ferreira et al . .…”

Chemical Composition, Algicidal, Antimicrobial, and Antioxidant Activities of the Essential Oils of Taiwania flousiana Gaussen

“…The essential oil constituents identification was carried out by comparing their recorded mass spectra with those stored in the National Institute of Standards and Technology Mass Spectral database (NIST 17 database) or with authentic compounds and confirmed by comparison of their retention index with authentic compounds reported in the literature [58]. The relative percent of each component in essential oil was counted by the area normalization method.…”

Hirtinone, a Novel Cycloartane-Type Triterpene and Other Compounds from Trichilia hirta L. (Meliaceae)

“…In the present paper, we report an investigation of a hexane extract of fruits of a T. hirta specimen, which allowed us to characterize nine terpenoids, including a novel cycloartane-type triterpene named hirtinone ( 1 ), five protolimonoids: nilocitin ( 2 ) [10,11], dihydronilocitin B [10,11] ( 3 ), melianone epimers ( 4 ) and ( 5 ) [11,12], piscidinol A ( 6 ) [10,11,13] and melianone lactone ( 7 ) [11,12], the tertranortriterpenoid hirtin ( 8 ) [14] and the sequiterpene spathulenol ( 9 ) [15]. The structures were established by spectrometric techniques, mainly HRESIMS and 1D and 2D NMR, and comparative analysis with literature values.…”