You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(5Z)-5-[[3,5-dichloro-4-(naphthalen-2-ylmethoxy)phenyl]methylidene]-3-phenyl-1,3-thiazolidine-2,4-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H17Cl2NO3S
assistant