1H-Isoindole-1,3(2H)-dione, 5,5'-dithiobis[6-chlorohexahydro-2-[(1,1,2,2-tetrachloroethyl)thio- 1H-Isoindole-1,3(2H)-dione, 5,5'-dithiobis[6-chlorohexahydro-2-[(1,1,2,2-tetrachloroethyl)thio]- NSC339866