InChI=1/C15H13NO4S/c17-21(18)8-12(11-3-1-2-4-15(11)21)16-10-5-6-13-14(7-10)20-9-19-13/h1-7,12,16H,8-9H2/t12-/m1/s1 1BC0AE536CCC658C