InChI=1S/C18H14N2O2S2/c21-15-17(23)9-11-5-1-3-7-13(11)19(17)16(22)18(24)10-12-6-2-4-8-14(12)20(15)18/h1-8,23-24H,9-10H2/t17-,18-/m0/s1