You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 8-[6-amino-5-[2-(trifluoromethyl)pyridin-3-yl]sulfanylpyrazin-2-yl]-3-methylidene-2,8-diazaspiro[4.5]dec-1-en-1-amine ?
user
C19H20F3N7S
assistant