InChI=1S/C22H22N2O5S/c1-3-4-11-29-17-6-8-18(9-7-17)30(27,28)24-21(22(25)26)13-16-14-23-20-10-5-15(2)12-19(16)20/h5-10,12,14,21,23-24H,11,13H2,1-2H3,(H,25,26)/t21-/m1/s1