InChI=1/C21H18N2O5S/c1-14-6-8-16(9-7-14)29(26,27)23-13-18(17-4-2-3-5-19(17)23)21(25)12-15(10-11-22)28-20(21)24/h2-9,13,15,25H,10,12H2,1H3/t15-,21-/m0/s1 BB095A20C7C113D8