Chemical composition of essential oils of two Hyptis suaveolens (L.) Poit leaves from Nigeria

The essential oils of the leaves of Hyptis suaveolens (L.) Poit collected from two different sources were isolated by hydrodistillation. The oils were analysed by GC and GC-MS; 36 constituents were identified in the oil of sample collected from the campus of Lagos State University (LASU), while 33 constituents were identified in the oil of sample from Obafemi Awolowo University (OAU). alpha-Pinene (13.6%), sabinene (13.2%), p-cymene (11.7%), terpinen-4-ol (9.8%) and terpinolene (6.3%) were the major monoterpenes in the LASU oil sample, while sabinene (30.0%), terpinen-4-ol (11.4%), terpinolene (5.6%), 1,8-cineole (5.2%), beta-pinene (4.4%) and alpha-terpinene (4.2%) were the main monoterpenes in the OAU oil sample. beta-caryophyllene (5.1-5.9%) and trans-alpha-bergamotene (1.6-5.2%) represented the major sesquiterpenes in both oils. Copyright (C) 2005 John Wiley & Sons.