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 (7S,8aR)-7-methyl-2-pyridin-4-yl-6,7,8,8a-tetrahydro-5H-imidazo[1,5-a]pyridine-1,3-dione ?
user
C13H15N3O2
assistant