InChI=1/C20H23N2O5S/c1-27-17-7-9-18(10-8-17)28(25,26)20(19(23)21-24)11-13-22(14-12-20)15-16-5-3-2-4-6-16/h2-10H,11-15H2,1H3,(H-,21,23,24)/q-1/p+1/fC20H24N2O5S/h21-22H/q B5C0CBC0F6AA21B6