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 4-[8-(2,4-dichloroanilino)-6-(3-ethoxy-2-hydroxyphenyl)-6a-(4-methoxyphenyl)-1,3,7,9-tetraoxo-4,6,9a,10,10a,10b-hexahydro-3aH-isoindolo[5,6-e]isoindol-2-yl]butanoic acid .
user
C39H37Cl2N3O9
assistant