InChIKey=ZQWICJYATMSSSD-QUABFQRHSA-M
InChI=1S/C20H14N2O5S.Na/c23-16-10-9-12-5-1-2-6-13(12)19(16)21-22-20-15-8-4-3-7-14(15)18(11-17(20)24)28(25,26)27;/h1-11,23-24H,(H,25,26,27);/q;+1/p-1/b22-21+;
S(c1cc(O)c(c2c1cccc2)/N=N\c1c2c(cccc2)ccc1O)([O-])(=O)=O.[Na+]