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H2S production from organic polysulfides by thiol reactions. (A) Proposed mechanism of H2S production by reaction of DADS and GSH via α carbon nucleophilic attack (red); H2S is not produced by thiol/disulfide exchange (blue). (B) Nucleophilic substitution of allyl perthiol at the α carbon followed by (C) thiol/disulfide exchange. (D and E) Thiol/disulfide exchange of organic trisulfides and higher polysulfides. See text below for description.
