Dibenzo[c,f][1,2]thiazepine,3,11-dichloro-6,11-dihydro-6-methyl-,5,5-dioxide

5,8-dichloro-10-dioxo-11-methyl-dibenzo[c,f][1,2]thiazepine ; 3,11-dichloro-6,11-dihydro-6-methyldibenzo[c,f][1,2]thiazepine 5,5-dioxide ; tianeptine thiazepinyl chloride impurity ; 3,11-dichloro-6,11-6-methyldibenzo[c,f][1,2]thiazepine5,5-dioxide ; 3,11-dichloro-6,11-dihydro-6-methyl-5,5-dioxodibenzo[c,f][1,2]thiazepine ; 3,11-dichloro-6-methyl-11h-benzo[c][2,1]benzothiazepine 5,5-dioxide ; dibenzo[c,f][1,2]thiazepine,3,11-dichloro-6,11-dihydro-6-methyl-,5,5-dioxide ; 5,8-dichloro-11-methyldibenzo[c,f]thiazepine 10,10-dioxide ; 3,11-dichloro-6-methyl-6,11-dihydrodibenzo[c,f][1,2]thiazepine 5,5-dioxide ; tianeptine intermediate (the ninth step)