You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 4-[4-[2-[4-(1-oxa-7-azaspiro[3.5]nonan-7-yl)anilino]pyrimidin-4-yl]phenyl]-4-oxobutanenitrile .
user
C27H27N5O2
assistant