You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name 2-methyl-1-[2-[3-oxo-3-[4-[5-(trifluoromethyl)pyrimidin-2-yl]piperazin-1-yl]propoxy]ethyl]-6,7-dihydro-5H-pyrrolo[2,3-d]pyridazin-4-one ?
user
C21H26F3N7O3
assistant