You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-methyl-7-(pyridin-2-ylmethoxymethyl)-5-(pyridin-3-ylmethyl)-6,7-dihydro-4H-triazolo[4,5-c]pyridine is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H22N6O
assistant