InChI=1/C21H20O7S/c1-13(2)17-12-21(22)27-19-10-14(4-6-16(17)19)28-29(23,24)15-5-7-18-20(11-15)26-9-3-8-25-18/h4-7,10-13H,3,8-9H2,1-2H3 6F8CE34B376CD9D4