((7-Carboxy-4-formyl-3,8-dihydroxy-1,6-dimethyl-11-oxo-11H-dibenzo(b,e)(1,4)dioxepin-9-yl)methyl) hydrogen fumarate 489-50-9 EINECS 207-698-8 Fumarprotocetraric acid NSC 249984 NSC 685588