2-butenedioic acid, mono[(7-carboxy-4-formyl-3,8-dihydroxy-1,6-dimethyl-11-oxo-11H-dibenzo[b,e][1,4]dioxepin-9-yl)methyl] ester, (2E)- 489-50-9 9-(3-Carboxy-acryloyloximethyl)-4-formyl-3,8-dihydroxy-1,6-dimethyl-11-oxo-11H-dibenzo[b,e][1,4]dioxepin-7-carboxylic acid 9-({[(2E)-3-carboxyprop-2-enoyl]oxy}methyl)-4-formyl-3,8-dihydroxy-1,6-dimethyl-11-oxo-11H-dibenzo[b,e][1,4]dioxepine-7-carboxylic acid But-2-enedioic acid mono-(7-carboxy-4-formyl-3,8-dihydroxy-1,6-dimethyl-11-oxo-11H-dibenzo[b,e][1,4]dioxepin-9-ylmethyl) ester Fumarprotocetraric acid InChI=1/C22H16O12/c1-8-5-12(24)10(6-23)19-15(8)22(31)34-20-11(7-32-14(27)4-3-13(25)26)17(28)16(21(29)30)9(2)18(20)33-19/h3-6,24,28H,7H2,1-2H3,(H,25,26)(H,29,30)/b4-3