You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named N-[(1-methylcyclopropyl)methyl]-5-([1,2,4]triazolo[1,5-a]pyridin-6-yl)-7,8-dihydropyrido[2,3-d]pyrimidin-2-amine is given. What is its corresponding molecular formula?
user
C18H19N7
assistant