IUPAC: sodium 1,6,6-trimethyl-10,11-dioxo-6H,7H,8H,9H,10H,11H-phenanthro[1,2-b]furan-2-sulfonate

SMILES: [Na+].Cc1c2c(oc1S([O-])(=O)=O)-c1ccc3c(CCCC3(C)C)c1C(=O)C2=O