InChI=1S/C16H15NO6S/c18-11-7-8-5-6-17-14-12(8)13(15(11)19)9-3-1-2-4-10(9)16(14)23-24(20,21)22/h1-4,7,14,16-19H,5-6H2,(H,20,21,22)