You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 3-heptyl-5-[1-[(4-methylphenyl)methyl]-2-oxoindol-3-ylidene]-2-sulfanylidene-1,3-thiazolidin-4-one ?
user
C26H28N2O2S2
assistant