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-chloro-N-[(5Z)-3-ethyl-5-[(3-heptoxy-4-methoxyphenyl)methylidene]-4-oxo-1,3-thiazolidin-2-ylidene]benzenesulfonamide .
user
C26H31ClN2O5S2
assistant