You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by 3-oxo-N-[1-(pyridin-3-ylmethyl)-1,2,4-triazol-3-yl]-1,2-dihydroindene-4-carboxamide ?
user
C18H15N5O2
assistant