InChI=1S/C19H21NO6S/c1-20-18(21)17(26-27(22,23)24)15(13-9-5-3-6-10-13)16(19(20)25-2)14-11-7-4-8-12-14/h3-12,15-17,19H,1-2H3,(H,22,23,24)