InChI=1/C21H21NO5S/c1-21(20(23)22-24,28(25,26)19-11-9-18(27-2)10-12-19)14-15-7-8-16-5-3-4-6-17(16)13-15/h3-13,24H,14H2,1-2H3,(H,22,23)/t21-/m1/s1/f/h22H 83DC9C7480D17C8A