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 3-(2-ethyl-1,3-dioxo-5,6,8,8a-tetrahydroimidazo[1,5-a]pyrazin-7-yl)pyridine-2-carbonitrile ?
user
C14H15N5O2
assistant