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-[6-[(2-ethylsulfanyl-1-hydroxycyclobutyl)methylamino]pyridin-3-yl]-4,5-dimethyl-1H-pyrimidin-6-one .
user
C18H24N4O2S
assistant