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 2-chloro-4-[(6R)-7-[4-chloro-3-(trifluoromethyl)benzoyl]-6-methyl-4-oxo-2-(propan-2-ylamino)-6,8-dihydro-5H-pyrido[3,4-d]pyrimidin-3-yl]-N-methylbenzamide ?
user
C27H26Cl2F3N5O3
assistant