A new chemical form of essential oil of Hyssopus officinalis L. (Lamiaceae) from Nigeria

Essential oil obtained by hydrodistillation from the air-dried leaves of Hyssopus officinalis L. (Lamiaceae) collected in Ajangbadi area, West of Lagos, Nigeria, was analyzed comprehensively for its constituents by means of gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS). The monoterpene hydrocarbons, á-pinene (70.9%) and â-pinene (10.9%) are the dominant constituents of the oil of H. officinalis. A cluster analysis was performed for comparison and characterization of H. officinalis essential oil from Nigeria with other oils reported in the literature from different locations across the world, and reveals chemical variation in this species with at least 8 different chemotypes. The compositional pattern of Nigerian oil sample was being reported for the first time and represents another chemotype of the oil of H. officinalis

Study on volatile constituents of Solanum nigrum var. viriginicum from Nigeria

Essential oil obtained from the hydrodistilled leaves of Solanum nigrum var. virginicum L. from Nigeria was characterised by means of gas chromatography (GC) and gas chromatography coupled with mass spectrometry (GC-MS). Thirty-seven volatile constituents accounting for 97.6% of the total oil contents were identified from the oil sample. The oil was highly composed of sesquiterpene compounds (70.8% hydrocarbon content and 10.2% oxygenated counterpart), but low in monoterpene (0.7% hydrocarbon and 1.2% oxygenated). Fatty acids were also present in appreciable quantity (14.1%). Germacrene D (14.8%), pentadecanal (11.4%), β-elemene (10.1%), α-bulnesene (7.9%), δ-cadinene (6.0%), β-caryophyllene (6.5%) and α-copaene (5.5%) were the major components of the oil. Comparative compositional analysis of the constituents of known studied Solanum species was also evaluate