## 3 Experimental Section
### Volatile Compounds Analysis  
Extraction conditions were based on previously published work of [PERSON] _et al._[52] and [PERSON] _et al._[54] with some modifications. Fresh seeds (15 g) were blended in an electric blender (model O-20, OsterizerTM, Boca Raton, FL, USA) for 15 s. The ground seeds (1 g) were transferred into a 20 mL vial, along with 7 \(\upmu\)g of a menthol solution (0.01% w/w) as an internal standard and sealed with a Nickel-aluminum crimp cap provided with a needle-piercable polytetrafluoroethylene/silicone septum. Vials were pre-equilibrated for 60 min at 50 \({}^{\circ}\)C. Solid-phase microextraction (SPME) was performed with a 75 mm divinylbenzene/carboxen/polydimethylsiloxane (DVB/CAR/PDMS) fiber (Supelco Co, Bellefonte, PA, USA). Extractions and injections were performed using a MPS2 autosampler (Gerstel, Linhicum-Baltimore City, MD, USA) fitted with a vial heater. The fiber was exposed for 10 min in the head space of the vial for analytes adsorption. Subsequently, the fiber was removed from the vial and placed into the chromatograph injection port for desorption.  
Gas chromatography separation and quantification was carried out using an Agilent GC 7890A series intrumenbt (Agilent Technologies, Inc., Santa Clara, CA, USA) equipped with a flame ionization detector (GC-FID). Injection port and detector temperature was 230 \({}^{\circ}\)C. The injector was operated in the splitless mode. The capillary columns used were an HP-5 60 m \(\times\) 0.32 mm i.d., 0.32 \(\upmu\)m film thickness; Agilent Technologies, Inc.) and a DB-Wax (60 m \(\times\) 0.32 mm i.d., 0.32 \(\upmu\)m film thickness; Agilent Technologies, Inc.). Owen temperature was programmed at initial temperature of 40 \({}^{\circ}\)C for 5 min, then raised at 5 \({}^{\circ}\)C/min to 230 \({}^{\circ}\)C and hold for 15 min. Helium was used as the carrier gas at a constant flow rate of 1 mL/min. A semi-quantitative evaluation was achieved by comparing individual peak area from GC-FID response to that of the internal standard. Each tabulated value corresponds to the average of 3 extraction replicates.  
Gas Chromatography Mass Spectrometry (GC/MS) analysis was carried out using an Agilent GC 7890A series equipped with an Agilent 5975C Mass Spectrometer in electron impact mode (EI) and a quadrupole analyzer. The temperatures of ion source and quadrupole were 230 and 250 \({}^{\circ}\)C respectively. Transfer line was set at 280 \({}^{\circ}\)C. Full scan mode was used in a range of 33-300 \(\upmu\)m, at a scan rate of 5.2/s, with an ionization voltage of 70 eV. The same chromatographic conditions as for GC-FID were used. MSD ChemStation E.01.00.237 software (Agilent Technologies, Inc.) was employed for data analysis.  
Identification of volatile compounds was performed by comparing their mass spectra with those in the NIST Mass Spectral Library (National Institute of Standards and Technology, Gaithersburg, MD, USA). Retention indices of all the volatile compounds were determined by the modified Kovats method reported by [PERSON] and [PERSON] [57]. MS identification was confirmed by comparing Kovats retention indices (RI) to RI reported in the literature [58].