You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by [(2E,5E)-5-[(4-ethyl-2,3,3a,8b-tetrahydro-1H-cyclopenta[b]indol-7-yl)methylidene]-2-(3-ethyl-4-oxo-2-sulfanylidene-1,3-thiazolidin-5-ylidene)-4-oxo-1,3-thiazolidin-3-yl]methyl formate ?
user
C24H25N3O4S3
assistant