1-(2-((2-Chloro-10,11-dihydrodibenzo[b,f]thiepin-10-yl)thio)ethyl)-4-methylpiperazine 2-Chloro-10,11-dihydrodibenzo[b,f]thiepin-10-yl 2-(4-methyl-1-piperazinyl)ethyl sulfide AIDS-135515 AIDS135515 NSC635366