(.+-.)-Metitepine maleate, 1-[10,11-dihydro-8-(methylthio)dibenzo[b,f]thiepin-10-yl]-4-methyl-, (.+-.)-, (Z)-2-butenedioate (1:1) NSC281816 Piperazine, 1-[10,11-dihydro-8-(methylthio)dibenzo[b,f]thiepin-10-yl]-4-methyl-, (+)-, (Z)-2-butenedioate (1:1)