You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 4-[[4-[methyl(oxolan-3-ylmethyl)amino]quinazolin-2-yl]methyl]-5-oxopyrazolo[1,5-a]quinazoline-3-carbonitrile .
user
C26H23N7O2
assistant