## 2 Materials and Methods
### Determination of Phenolic Compounds by High Performance Liquid Chromatography (HPLC)  
Before analysis, each powder sample was reconstituted in Milli-Q water to achieve a similar total solid content as the respective juice sample [15]. The identification and quantification of phenolic compounds were conducted using a HPLC system (HP Agilent 1100 series, Agilent Technologies, Santa Clara, CA, USA) that was equipped with a diode array detector (DAD). A C\({}_{12}\) column (Synergi Max-RP 80 A, 4 \(\upmu\)m particle size, 250 \(\times\) 4.6 mm, Phenomenex, Torrance, CA, USA) was applied for phenolic separation. Two mobile phases, A, 0.1% formic acid in Milli-Q water (\(v/v\)), and B, 0.1% formic acid in acetonitrile (\(v/v\)), were used at a constant flow rate of 1 mL/min. The mobile phases were programmed, as follows: 0 min., 5% B (95% A); 10 min., 15% B (85% A); 20 min., 25% B (75% A); 30 min., 35% B (65% A); 32 min., 50% B (50% A); 36 min., 25% B (75% A); 38 min., 5% B (95% A); and, 40 min., 5% B (95% A). The injection volume was 20 \(\upmu\)L, the column was maintained at 25 \({}^{\circ}\)C, and the detector wavelength was set as 280 nm. A stock solution for phenolic standards was prepared by dissolving chlorogenic acid (25 mg), p-hydroxybenzoic acid (25 mg), vanillic acid (25 mg), sinapic acid (25 mg), and heperidin (25 mg) into 25 mL of methanol. The stock solution was then diluted into different concentrations in order to construct standard curves for the quantification of phenolic compounds the samples. The limit of detection (LOD) and limit of quantification (LOQ) of each standard were calculated, as reported by [PERSON], [PERSON], and [PERSON] (2019) [26]. The precision of the method was evaluated by determining the repeatability (intra-day) and reproducibility (inter-day), and the results were reported as relative standard deviation (RSD%). The intra-day precision was performed by comparing the analysis that was conducted on the same day, whereas the inter-day precision was conducted on three continuous days [26]. Characterization of Aroma Compounds by Headspace Solid-Phase Micro-Extraction and Gas Chromatography-Mass Spectrometry (HS-SPME-GC-MS)  
The reconstituted samples and original juices (2 mL) were transferred to a 20 mL headspace vial that was sealed with a screw cap. Ten microliter of isotopically labelled standard mixture containing _n_-hexyl-2,2,3,3,4,4,5,5,6,6-d\({}_{11}\)-alcohol (0.40 mg/mL), hexanalo-d\({}_{12}\) (0.022 mg/mL), ethyl hexanoate-d\({}_{11}\) (0.39 mg/mL), hexanoic-d\({}_{11}\) acid (2.75 mg/mL), \(\alpha\)-terpineol-d\({}_{3}\) (0.025 mg/mL), (\(\pm\))-linalo-d\({}_{3}\) (0.025 mg/mL), and 2-phenyl-d\({}_{5}\)-ethanol (2.9 mg/mL) was supplemented into each sample as internal standards (IS). The sealed vial was incubated for 15 min. at 40 \({}^{\circ}\)C in a shaking heated cube, and the released volatiles were then extracted by a SPME fibre (2 cm, 24-Gauge, 50/30 \(\upmu\)m, Supleco, Bellefonte, PA, USA) that was coated with divinylbenzene/carboxen/polyddimethylsiloxane (DVB/CAR/PDMS) at the same temperature for 45 min. After extraction, the fibre was desorbed in the GC injector for 5 min. at 250 \({}^{\circ}\)C.  
The volatile compounds were analysed while using a GC-MS system (Shimadzu GCMS-QP2010 Plus, Kyoto, Japan) that was equipped with an Agilent DB-WAX capillary column (30 m \(\times\) 0.25 mm i.d. \(\times\) 0.25 \(\upmu\)m df) (Santa Clara, CA, USA), as reported in our previous studies [27; 28]. The conditions of the column were set, as follows: the oven temperature started from 40 \({}^{\circ}\)C for 5 min., increased to 80 \({}^{\circ}\)C at 5 \({}^{\circ}\)C/min. and held for 5 min., raised to 160 \({}^{\circ}\)C for 5 min. (5 \({}^{\circ}\)C/min), and, finally, ramped to 230 \({}^{\circ}\)C at 10 \({}^{\circ}\)C/min. for another 2 min. The mass spectrometer was performed in electron ionization mode at 70 eV with a full scan from 35 to 350 \(m/z\).