You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 3-[(1S,3R,3aR,6aR)-5-[(4-methoxyphenyl)methyl]-2',4,6-trioxospiro[1,2,3a,6a-tetrahydropyrrolo[3,4-c]pyrrole-3,3'-1H-indole]-1-yl]propanoic acid by IUPAC nomenclature, provide its molecular formula.
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C24H23N3O6
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