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 identified by 1-[4-(2-amino-1,3,8-triazaspiro[4.5]dec-2-en-8-yl)-4-oxobutyl]-3-pyridin-3-ylbenzimidazol-2-one ?
user
C23H27N7O2
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