You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[(2R)-3-[2-[2-chloro-6-[2-(2,3-dihydrofuran-3-yl)ethylamino]-5-fluoropyrimidin-4-yl]hydrazinyl]-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxyformamide by IUPAC nomenclature, provide its molecular formula.
user
C20H28ClFN6O4
assistant