InChI=1S/C18H15N3O6S/c1-8(23)20-11(18(25)26)7-28-17-15(19)12(24)5-14-16(17)21-10-4-9(6-22)2-3-13(10)27-14/h2-6,11H,7,19H2,1H3,(H,20,23)(H,25,26)/t11-/m0/s1