1,3-Benzenedicarboxylic acid, 4,4'-(1,4,10-trioxa-7,13-diazacyclopentadecane-7,13-diylbis(5-methoxy-6,2-benzofurandiyl))bis- 124549-08-2 SBFI Sodium benzofuran isophthalate sodium-binding benzofuran isophthalate