InChI=1S/C20H25NO8S/c1-21-8-7-12-9-17(27-3)15(22)11-14(12)19(21)20(29-30(23,24)25)13-5-6-16(26-2)18(10-13)28-4/h5-6,9-11,19-20,22H,7-8H2,1-4H3,(H,23,24,25)