4,4'-Thiobis(resorcinol), 2,4,2',4'-tetrahydroxydiphenyl sulfide, 2,4-Dihydroxyphenyl sulfide, 4,4'-sulfanediyl-di-resorcinol, 1,3-Benzenediol,4,4'-thiobis, 4,4'-Thiodiresorcinol, Bis-(2.4-dihydroxy-phenyl)-sulfid, bis(2,4-dihydroxoybenzo)sulphide, 4,4'-Diresorcyl sulfide, 2,2',4,4'-Tetrahydroxydiphenyl sulfide, Bis(2,4-dihydroxyphenyl) sulfide, 4,4'-Sulfandiyl-di-resorcin