InChI=1S/C16H18O7S/c1-22-12-9-13(17)16(14(18)10-12)15(23-24(19,20)21)8-7-11-5-3-2-4-6-11/h2-6,9-10,15,17-18H,7-8H2,1H3,(H,19,20,21)