You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-(3,6-dihydroxy-8a,10a-dihydro-3H-xanthen-9-yl)-5-(2,5-dioxopyrrolidin-1-yl)oxycarbonylbenzoic acid .
user
C25H19NO9
assistant