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. 2018 May 10;12:52. doi: 10.1186/s13065-018-0428-z

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© The Author(s) 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Main constituents identified in the oils of P. guineense: (1) α-pinene, (2) myrcene, (3) limonene, (4) β-caryophyllene, (5) caryophyllene oxide, (6) α-copaene, (7) ar-curcumene, (8) β-bisabolene, (9) muurola-4,10(14)-dien-1-β-ol, (10) epi-β-bisabolol, (11) β-bisabolol