InChI=1/C19H20N2O5S/c1-4-27(22,23)15-8-9-17(25-3)16(11-15)21-19-20-12-18(26-19)13-6-5-7-14(10-13)24-2/h5-12H,4H2,1-3H3,(H,20,21)/f/h21H 276FF55DD8DDDC95