InChI=1S/C17H20O9S/c1-27-7-17(13(26-17)8-5-3-2-4-6-8)16(23)25-15-11(20)9(18)10(19)12(24-15)14(21)22/h2-6,9-13,15,18-20H,7H2,1H3,(H,21,22)