S,S'-bis(10-(1,4,7-tris(trifluoroacetyl)-1,4,7-triazacyclododecyl))-1',3'-dithiobenzene

S,S'-bis(10-(1,4,7-tris(trifluoroacetyl)-1,4,7-triazacyclododecyl))-4',4''-dithiobiphenyl