4 8-mercaptomethyl-1 11-dimercapto-3 6 9-trithia undecane July 8, 2019 16 32 64 128 4 4'-trimethylenedipyridine 4 4'-trimethylenedipiperidine 3-mercapto-2-methyl-1 2-dihydro-1 2 4-triazine-5 6-dione
