InChI=1S/C23H25NO7S/c1-3-4-5-20-22(18-14-16(24-32(2,28)29)8-11-19(18)31-20)23(27)15-6-9-17(10-7-15)30-13-12-21(25)26/h6-11,14,24H,3-5,12-13H2,1-2H3,(H,25,26)