You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl 4-[N'-[2-(6,7,8,9-tetrahydro-5H-[1,2,4]triazolo[4,3-a]azepin-3-yl)ethyl]carbamimidoyl]piperazine-1-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H33N7O2
assistant