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 (1R,3aR,6aS)-1-(2,3-dichlorophenyl)-5-(3-methoxyphenyl)spiro[3a,6a-dihydro-1H-furo[3,4-c]pyrrole-3,2'-indene]-1',3',4,6-tetrone .
user
C27H17Cl2NO6
assistant