“…However, it was also shown that these reactions depend on various parameters, including the structure of the involved phenolics, the concentration of transition element catalysts or the composition of organic acids (Danilewicz, 2011(Danilewicz, , 2014Makhotkina & Kilmartin, 2013). Through untargeted LC-MS analyses, Arapitsas et al showed that SO 2 added to wine takes part in various reactions including the formation of sulfonated adducts of indole-3-lactic hexoside, tryptophol, glutathione, cysteine and pantetheine (Arapitsas et al, 2016). They further demonstrated that the sulfonation of metabolites with an indole scaffold dominated in white wines (Arapitsas, Guella, & Mattivi, 2018).…”