InChI=1/C20H18N2O4S2/c1-11-7-4-5-8-13(11)21-18(24)16-12(2)15(20(25)26-3)19(28-16)22-17(23)14-9-6-10-27-14/h4-10H,1-3H3,(H,21,24)(H,22,23)/f/h21-22H 52BE754CA3E79C38