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 3-[(2E)-2-(2-methoxy-2-oxoethylidene)-4-oxo-1,3-thiazolidin-3-yl]propyl 3-(4-oxoquinazolin-3-yl)propanoate ?
user
C20H21N3O6S
assistant