Šindelář, K: Neuroleptics of the 10-piperazino-10,11-dihydrodibenzo[b,f]thiepin series and related substances : piperazine-alkylated homologues of octoclothepin and methiothepin; 5,5-dimethyl-10,11-dihydro-5H-dibenzo[b,f]silepin analogue of perathiepin