Eugenia florida DC. belongs to the Myrtaceae family, which is present in almost all of Brazil. This species is popularly known as pitanga-preta or guamirim and is used in folk medicine to treat gastrointestinal problems. In this study, two specimens of Eugenia florida (Efl) were collected in different areas of the same region. Specimen A (EflA) was collected in an area of secondary forest (capoeira), while specimen B (EflB) was collected in a floodplain area. The essential oils (EOs) were extracted from both specimens of Eugenia florida by means of hydrodistillation. Gas chromatography coupled to mass spectrometry (GC/MS) was used to identify the volatile compounds present, and the antioxidant capacity of the EOs was determined by antioxidant capacity (AC-DPPH) and the Trolox equivalent antioxidant (TEAC) assay. For E. florida, limonene (11.98%), spathulenol (10.94%) and α-pinene (5.21%) were identified as the main compounds of the EO extracted from sample A, while sample B comprised selina-3,11-dien-6α-ol (12.03%), eremoligenol (11.0%) and γ-elemene (10.70%). This difference in chemical composition impacted the antioxidant activity of the EOs between the studied samples, especially in sample B of E. florida. This study is the first to report on the antioxidant activity of Eugenia florida DC. essential oils.

中文翻译：

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Eugenia florida DC 两个标本叶片中精油的化学成分和抗氧化活性。

尤金尼亚佛罗里达DC。属于桃金娘科，几乎遍及巴西全境。该物种通常被称为pitanga-preta或guamirim，在民间医学中用于治疗胃肠道问题。在这项研究中，在同一地区的不同地区收集了两个Eugenia florida (Efl) 标本。标本 A (EflA) 是在次生林 (capoeira) 地区收集的，而标本 B (EflB) 是在洪泛区收集的。精油 (EO) 是从Eugenia florida 的两个标本中提取的通过水蒸馏。气相色谱与质谱联用 (GC/MS) 用于鉴定存在的挥发性化合物，EO 的抗氧化能力由抗氧化能力 (AC-DPPH) 和 Trolox 等效抗氧化剂 (TEAC) 测定确定。对于E. florida，柠檬烯 (11.98%)、匙羹藤醇 (10.94%) 和 α-蒎烯 (5.21%) 被确定为从样品 A 中提取的 EO 的主要化合物，而样品 B 包含 selina-3,11-dien- 6α-醇 (12.03%)、eremoligenol (11.0%) 和 γ-榄香烯 (10.70%)。这种化学成分的差异影响了所研究样品之间 EO 的抗氧化活性，尤其是在E. florida 的样品 B 中。本研究首次报道了Eugenia florida的抗氧化活性直流电。精油。