You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 4-[4-[bis(2-chloroethyl)amino]phenyl]-N-[1-[(2R,3R,4S,5R)-3,4-dihydroxy-5-methyloxolan-2-yl]-5-fluoro-2-oxopyrimidin-4-yl]butanamide is given. What is its corresponding molecular formula?
user
C23H29Cl2FN4O5
assistant