## 4 Conclusions  
In this study, HS-SPME-GC-MS was used to characterize the VOCs profile in the peel and, for the first time, in the juice of three Australian finger lime CVs grown in Sicily (southern Italy), namely Pink Pearl, Sanguinea, and Faustrime. In total, 84 VOCs were identified. The analytical data obtained showed that the three CVs are characterized by distinct volatile chemotypes with unusual ratios of major volatiles: limonene/sabinene/bicyclogermacrene in CV Pink Pearl, limonene/\(\gamma\)-terpinene/bicyclogermacrene in CV Sanguinea and limonene/\(\beta\)-phellandrene/\(\gamma\)-terpinene in CV Faustrime. Moreover, some constituents were exclusively found in one CV, (e.g., ethyl acetate (E1), hexyl butyrate (E4), 2-butenal (Ald1), 2-hexen-1-ol (Al4), carvone (MO6), \(\beta\)-bourbonene (Sesq5) epiglobulol (Sesq3l), _trans_-sabinene hydrate in the Pink Pearl, \(\beta\)-elemene (Sesq9) in Sanguinea, and cis-limonene oxide and meridolol in the peel of Faustrime), suggesting that these metabolites can be considered markers of individual CV. The uniqueness of the VOCs profile of the three finger limes was also shown by PCA, which highlighted a clear discrimination of the samples in three clusters The first correlated to the peel of the Sanguinea, the second to the peel of Faustrime, and a third group formed by the peel of Pink Pearl along with the juice of the three varieties. According to the PCA results, the cluster related to the Sanguinea peel is characterized by a higher content of the two hydrocarbon monoterpenes (MH5 and MH13) and three sesquiterpenes (Sesq3, Sesq18, and Sesq22). The peel of Faustrime is differentiated by the higher presence of four hydrocarbon monoterpenes (MH1, MH7, MH8, and MH15), along with two oxygenase monoterpenes (MO3 and MO7) and the three sesquiterpenes (Sesq8, Sesq16, and Sesq23). Data related to the juice of all three varieties and the peel of the PinkPearl showed that these samples are directly correlated to limonene and \(\beta\)-phellandrene (MH10 and MH11). Among the VOCs that mostly contributed to the differentiation of the three finger lime varieties, limonene, sabinene \(\gamma\)-terpinene, \(\alpha\)-pinene, \(\alpha\)-phellandrene, \(\beta\)-myrcene, p-cymene, linalool, \(\beta\)-citronellol, \(\alpha\)-caryophilene, and the putatively identified \(\delta\)-elemene, ledene, bicyclogermacrene, \(\alpha\)-bergamotene, and \(\beta\)-bisabolene have been previously reported to exhibit important biological activities, suggesting that these Australian fruits acclimatized in Sicily, in addition to possessing distinctive volatile compositions, show promise for commercial development as functional foods. The following supporting information can be downloaded at: [[https://www.mdpi.com/article/10.3390/molecules27227846/s1](https://www.mdpi.com/article/10.3390/molecules27227846/s1)]([https://www.mdpi.com/article/10.3390/molecules27227846/s1](https://www.mdpi.com/article/10.3390/molecules27227846/s1)), Figure S1: Representative TICs of the peel (A) and the juice (B) of the Pink Pearl CV. (1) \(\alpha\)-Thujene, (2) Sabinene; (3) \(\beta\)-Mycrene; (4) \(\alpha\)-Terpinene; (5) Limonene; (6) \(\gamma\)-Terpinene; (7) \(\alpha\)-Terpinolene; (8) \(\delta\)-Elemene; (9) 4-Terpineol; (10) Ledene; (11) Bicyclogermacrene; (12) \(\beta\)-Citronellol; *IS. Figure S2: Representative TICs of the peel (A) and the juice (B) of the Sanguinea CV. (1) \(\alpha\)-Pinene; (2) Sabinene; (3) \(\beta\)-Mycrene; (4) Limonene; (5) \(\gamma\)-Terpinene; (6) \(\alpha\)-Terpinolene; (7) \(\delta\)-Elemene; (8) Aromadendrene; (9) Isoledene; (10) 4-Terpineol; (11) Ledene; (12) Bicyclogermacrene; (13) \(\alpha\)-Farnesene; *IS. Figure S3: Representative TICs of the peel (A) and the juice (B) of the Faustrime CV.