“…Positive identification of compounds was done by comparison of mass spectra with those contained in the NIST mass spectral library (NIST MS Search 2.0, mainlib, replib 243893 total spectra) and/or calculation of retention indices relative to a series of n‐alkanes (C‐5‐C‐19; Sigma‐Aldrich, Gillingham‐Dorset, UK) and comparison with mass spectrum and retention time of commercial reference compounds provided by Sigma‐Aldrich (Steinheim, Germany) and published data (Bailey, Rourke, Gutheil, & Wang, ; ; Giri, Osaka, & Ohshima ; IARC ; Medina, Satue‐Gracia, & Frankel, ; Prost, Hallier, Cardinal, Serot, & Courcoux, ; Smagula, Ho, & Chang, ; Spurvey, Pan, & Shahidi, ; Taylor & Mottram, ). The integration of peak area was performed using Thermo Xcalibar™ software (version 2.1).…”