You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 3-[[2-[(2,4-dicarboxy-1-azabicyclo[1.1.0]butan-3-yl)methyl]-4-(3',6'-dihydroxy-3-oxospiro[2-benzofuran-1,9'-xanthene]-1'-yl)oxy-6-hydroxy-3-nitrophenyl]methyl]-1-azabicyclo[1.1.0]butane-2,4-dicarboxylic acid .
user
C38H25N3O17
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