You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name 3-[(7R)-7-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]-5-azaspiro[2.4]heptan-5-yl]-3-sulfanylidenepropanenitrile ?
user
C16H18N6S
assistant