InChI=1S/C18H25NO7S/c1-4-23-18(27)19-9-12-5-7-13(8-6-12)26-17-15(22)14(21)16(10(2)24-17)25-11(3)20/h5-8,10,14-17,21-22H,4,9H2,1-3H3,(H,19,27)