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-[4-[[2-[6-(methylsulfanylmethyl)thieno[2,3-d]pyrimidin-4-yl]-2,7-diazaspiro[4.4]nonan-7-yl]methyl]phenyl]acetonitrile ?
user
C24H27N5S2
assistant