1-Piperazineethanol, 4-(2-ethyl-7-fluoro-10H-thieno(2,3-b)(1,5)benzodiazepin-4-yl)-, dimaleate 4-(2-Ethyl-7-fluoro-10H-thieno(2,3-b)(1,5)benzodiazepin-4-yl)-1-piperazineethanol dimaleate 74162-52-0