InChI=1S/C20H19NO3S.Na/c22-19-18(25-20(23)21-19)12-14-6-9-17-15(10-14)7-8-16(24-17)11-13-4-2-1-3-5-13;/h1-6,9-10,16,18H,7-8,11-12H2,(H,21,22,23);/q;+1/p-1/t16-,18?;/m1./s1