InChI=1/C20H19NO5S/c1-26-17-8-10-18(11-9-17)27(24,25)19(20(22)21-23)13-14-6-7-15-4-2-3-5-16(15)12-14/h2-12,19,23H,13H2,1H3,(H,21,22)/t19-/m1/s1/f/h21H 373193D8B2FDBC49