You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named (2R)-1-[4-(2-chloro-7-methylquinazolin-4-yl)piperazin-1-yl]-2-hydroxy-4-methylpentan-1-one;2,4-dichloro-7-methylquinazoline is given. What is its corresponding molecular formula?
user
C28H31Cl3N6O2
assistant