Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Pará, Belém 66075-900, Brazil.
Universidade do Estado do Pará Campus Cametá, Cametá 68400-000, Brazil.
Molecules. 2022 Mar 30;27(7):2234. doi: 10.3390/molecules27072234.
(Myrtaceae) species have been well investigated due to their chemical and biological relevance. The present work aimed to carry out the chemotaxonomic study of essential oils of the species , , and , sampled in the Brazilian Amazon and compare them with the volatile compositions from other species reported to Brazil and Colombia. The leaves of six specimens were collected (PA, Brazil) during the dry season, and their chemical compositions were analyzed by gas chromatography-mass spectrometer (GC-MS) and gas chromatography-flame ionization detector (GC-FID). The main compounds identified in the essential oils were monoterpenes with pinane and menthane skeletons, followed by sesquiterpenes with caryophyllane and cadinane skeletons. Among the sampled specimens, five chemical profiles were reported for the first time: profile I (, α-pinene, 54.0-67.2%); profile II (, terpinolene 23.1%, α-phellandrene 17.7%, and γ-terpinene 8.7%); profile III (, γ-cadinene 17.5%, and an unidentified oxygenated sesquiterpene 15.0%); profile IV (, -caryophyllene 43.2%, and α-humulene 5.3%); and profile V (, -caryophyllene 19.1%, and caryophyllene oxide 41.1%). The chemical profiles showed significant variability in extraction methods, collection sites, plant parts, and genetic aspects.
（桃金娘科）物种由于其化学和生物学相关性而得到了很好的研究。本工作旨在对巴西亚马逊地区采集的 、 和 种的精油进行化学分类学研究，并将其与从巴西和哥伦比亚报道的其他 种的挥发性成分进行比较。在旱季采集了 6 个 标本的叶片（巴西 PA），并通过气相色谱-质谱联用仪（GC-MS）和气相色谱-火焰离子化检测器（GC-FID）对其化学成分进行了分析。在精油中鉴定出的主要化合物是具有蒎烷和薄荷烷骨架的单萜，其次是具有石竹烷和卡丹烷骨架的倍半萜。在所采集的 个标本中，有 5 种化学成分图谱为首次报道：图谱 I（ ，α-蒎烯，54.0-67.2%）；图谱 II（ ，松油萜醇 23.1%，α-水芹烯 17.7%，γ-松油烯 8.7%）；图谱 III（ ，γ-丁香烯 17.5%，和一种未鉴定的含氧倍半萜 15.0%）；图谱 IV（ ，-石竹烯 43.2%，和α-葎草烯 5.3%）；图谱 V（ ，-石竹烯 19.1%，和石竹烯氧化物 41.1%）。化学图谱显示在提取方法、采集地点、植物部位和遗传方面存在显著的可变性。
