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 2-[2-chloro-3-[5-[(4S)-4-methyl-2-oxa-8-azaspiro[4.5]decan-8-yl]pyrazin-2-yl]sulfanylphenyl]-1-pyrimidin-2-ylethanone .
user
C25H26ClN5O2S
assistant