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1.32	The title is: Structural Classification and Chemical Characteristics of Monoterpenoids Belonging to the Cinene Structural Type
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Title: Structural Classification and Chemical Characteristics of Monoterpenoids Belonging to the Cinene Structural Type

GC-MS Identification of Cinene in Black Pepper Methanolic Extracts

Gas Chromatography-Mass Spectrometry (GC-MS) analysis of black pepper methanolic extracts identified cinene as an active component and revealed it to be among the three most abundant components in the extract [1]. The relative abundances of these key components are summarized below:

Relative Abundances of Key Components in Black Pepper Methanolic Extracts (GC-MS Analysis)

Component	Relative Abundance	Citation
Caryophyllene	32.3%	[1]
Delta-3-carene	18.7%	[1]
Cinene	15.5%	[1]

Cinene Content and Herbicidal Activity Metrics in Lemon Essential Oil

Cinene is a terpenoid component detected in lemon essential oil, where it ranks among the 10 main identified chemicals [2]. Its content in lemon essential oil and herbicidal activity are summarized below:

Key Characteristics of Cinene in Lemon Essential Oil

Parameter	Value	Citation
Content in lemon essential oil	28.53%	[2]
EC₅₀ (herbicidal activity)	0.0266 g mL⁻¹	[2]

Cinene as a Major Constituent in Compound Essential Oils

The primary chemical constituents of compound essential oils (CEOs) are eucalyptol (16.7%), α-pinene (16.54%), menthol (12.86%), and cinene (7.37%) [3].

References

[1] Baig, B.; Yousaf, S., Phytochemical Screening Of Neem And Black Pepper For Bioefficacy Against Insect Pests Of Okra And Potato, 2021, Sarhad Journal of Agriculture

[2] Xu, Jingjing; Bai, Haodong; Bai, Zhengdong; Li, Zuren, CHARACTERISTICS OF EIGHTEEN ESSENTIAL OILS ON ECHINOCHLOA CRUS-GALLI AND GALIUM APARINE SEEDLING GROWTH, 2023, PAKISTAN JOURNAL OF BOTANY

[3] Wang H, Song L, Ju W, Wang X, Dong L, Zhang Y, Ya P, Yang C, Li F., The acute airway inflammation induced by PM2.5 exposure and the treatment of essential oils in Balb/c mice, 2017, Sci Rep