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 N-tert-butyl-3-[(E)-3-[2-(trifluoromethoxy)phenyl]prop-2-enoyl]-1,3-thiazolidine-4-carboxamide ?
user
C18H21F3N2O3S
assistant