The categorization in the attached image is correct. The 12 identified compounds can be classified into the following groups:

Monoterpenes: Camphene, Para-Cymene, 1-Limonene, Gamma-Terpinen

Sesquiterpenes: Trans-Decalone

Aromatic aldehydes: Cuminic Aldehyde

Cyclic ketones: Cyclopentanone

Aromatic alcohols: Acetyl phenyl carbinol

Amines: 1-amino-1-o

Heterocycles: 5-Methyl-2-Phenyl indolizine, 5-nitrobenzofuran-2-carboxylic

Inorganic acids: Silicic acid

Monoterpenes and sesquiterpenes are the largest groups of compounds in the essential oil. They are hydrocarbons that are derived from isoprene, a five-carbon molecule. Monoterpenes have ten carbon atoms, while sesquiterpenes have fifteen carbon atoms.

Aromatic aldehydes are a group of compounds that contain an aldehyde group (-CHO) attached to an aromatic ring. They are often used as fragrances in perfumes and cosmetics.

Cyclic ketones are a group of compounds that contain a ketone group (=O) in a cyclic ring. They are often used as solvents and flavorings.

Aromatic alcohols are a group of compounds that contain an alcohol group (-OH) attached to an aromatic ring. They are often used as fragrances and flavorings.

Amines are a group of compounds that contain an amino group (-NH2). They are often used as solvents and pharmaceuticals.

Heterocycles are a group of compounds that contain a ring with at least one atom that is not carbon. They are often used as pharmaceuticals and agrochemicals.

Inorganic acids are a group of compounds that contain a hydrogen atom that is ionizable in water. They are often used as solvents and catalysts.

The classification of these compounds is important because it can help to predict their properties and applications. For example, monoterpenes are often volatile and have a strong odor, while sesquiterpenes are less volatile and have a more subtle odor. Aromatic aldehydes are often used as fragrances, while cyclic ketones are often used as solvents. Amines are often used as pharmaceuticals, while heterocycles are often used as agrochemicals. Inorganic acids are often used as solvents and catalysts. Mehdi Aghighi Shahverdi