1-(N-Methylpiperazine)-4-methylthioxanthenone 19057-91-1 4-Methyl-1-(4-methyl-1-piperazinyl)thioxanthen-9-one 5-23-02-00499 (Beilstein Handbook Reference) BRN 0324216 Thioxanthen-9-one, 4-methyl-1-(4-methyl-1-piperazinyl)-