You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 2-(1-oxo-7-phenyl-3,4-dihydro-2H-pyrrolo[1,2-a]pyrazin-4-yl)acetic acid is given. What is its corresponding molecular formula?
user
C15H14N2O3
assistant