InChI=1S/C18H15N3O8S2.2Na/c1-10(22)19-13-7-8-14(30(24,25)26)12-9-15(31(27,28)29)17(18(23)16(12)13)21-20-11-5-3-2-4-6-11;;/h2-9,20H,1H3,(H,19,22)(H,24,25,26)(H,27,28,29);;/q;2*+1/p-2