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Citrus Essential Oil of Nigeria Part IV: Volatile Constituents of Leaf Oils of Mandarins (Citrus Reticulata Blanco) From Nigeria

Adeleke A. Kasali, Oladipupo A. Lawal, Olatunji T. F. Abanikannda, Abayomi A. Olaniyan and William N. Setzer

Chemistry Department, Lagos State University, P.M.B 1087 Apapa, Lagos Nigeria.

Department of Chemistry, University of Zululand South Africa

Department of Zoology, Lagos State University Ojo -State Name

National Horticultural Research Institute, Idi Ishin, P.M.B. 5234 Jericho Reservation Area, Ibadan Oyo State Nigeria

Department of Chemistry, University of Alabama in Huntsville, Huntsville, AL358999, USA.

Abstract: The chemical composition of hydrodistilled oils obtained from the leaves of six Citrus reticulata Blanco (mandarin) cultivars grown in Nigeria were examined by GC and GC/MS, the result of their chemical composition were further submitted to cluster analysis. Fifty seven constituents were characterized accounting for 88.2 - 96.7% of the total oils. Sabinene, g -terpinene, P-cymene, d -3-carene and (E)- b -ocimene were observed in great variability in all the oils. Other constituents include linalool, myrcene, terpinen-4-ol and cis-sabinenehydrate. In addition, limonene, terpinolene, b -pinene, and a -pinene were also detected in appreciable concentrations. b -sinensal and a -sinensal were isolated by preparative GC and characterized by one- and two-dimensional NMR techniques.

Keywords: Citrus reticulata ; Rutaceae; essential oil; sabinene; d - 3-carene; linalool.