4-[6-(2-chloroethyl)-3-methyl-3,6,7,8-tetrahydroimidazo[4,5-h][1,4]benzothiazin-2-yl]butanoic acid InChI=1/C16H20ClN3O2S/c1-19-11-5-6-12-16(23-10-9-20(12)8-7-17)15(11)18-13(19)3-2-4-14(21)22/h5-6H,2-4,7-10H2,1H3,(H,21,22 imidazo[4,5-h][1,4]benzothiazine-2-butanoic acid, 6-(2-chloroethyl)-3,6,7,8-tetrahydro-3-methyl-