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 2-[[(1S)-1-(5-chloropyridin-3-yl)ethyl]amino]-N-(3-hydroxycyclobutyl)thieno[3,2-d]pyrimidine-4-carboxamide .
user
C18H18ClN5O2S
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