Additional file 1 of Formation of the toxic furan metabolite 2-butene-1,4-dial through hemin-induced degradation of 2,4-alkadienals in fried foods

Additional file 1: Suppl-1. Mass spectra of synthetic CPL. a) Mass chromatogram (negative TIC). b) Mass spectrum (positive). Mass chromatogram (negative TIC). Suppl-2. Formation of CPL from high concentrations of HDE. The upper figures display the UV spectra of peaks a’, b’, and c’. Suppl-3. Formation of CPL from low concentrations of HDE (Suppl.). Inset: UV spectrum of the major peak. Suppl-4. Formation of CPL from low concentrations of HDE (purified). The upper figures display the UV spectra of peaks a', b', and e'. Suppl-5. Formation of BDA-dC adducts from high concentrations of HDE. Suppl-6. Formation of BDA-dC adducts from low concentrations of HDE.