InChI=1S/C22H19ClO4S/c23-16-15-21(17-7-3-1-4-8-17)22(18-9-5-2-6-10-18)19-11-13-20(14-12-19)27-28(24,25)26/h1-14H,15-16H2,(H,24,25,26)