. . . . . . . . . . . . . . . "S,S\u2032-[Quinoxaline-2,3-diylbis(methylene)]di(ethanethioate)" . . . . "2,3-Bis(acetylmercaptomethyl)quinoxaline" . "2,3-Bis(acetylmercaptomethyl)quinoxaline" .