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)-

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

(E)-2-Butenedioic acid hydrogen 1-[(7-carboxy-4-formyl-3,8-dihydroxy-1,6-dimethyl-11-oxo-11H-dibenzo[b,e][1,4]dioxepin-9-yl)methyl] ester

4-Formyl-3,8-dihydroxy-9-[[[(E)-4-hydroxy-1,4-dioxo-2-butenyl]oxy]methyl]-1,6-dimethyl-11-oxo-11H-dibenzo[b,e][1,4]dioxepin-7-carboxylic acid