You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[4-amino-1-(1-hex-2-ynoylpyrrolidin-2-yl)imidazo[1,5-a]pyrazin-4-ium-3-yl]-N-pyridin-2-ylbenzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H28N7O2+
assistant