You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as ethyl 4,6-dichloro-3-[[3-(4-hydroxyphenyl)-2,4-dioxoimidazolidin-1-yl]methyl]-1H-indole-2-carboxylate using the IUPAC nomenclature.
user
C21H17Cl2N3O5
assistant