You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[8-(4-methoxyphenyl)-3,4-dioxo-7,8a-dihydro-6H-imidazo[2,1-c][1,2,4]triazin-2-ium-2-yl]-N-(oxolan-2-ylmethyl)acetamide by IUPAC nomenclature, provide its molecular formula.
user
C19H24N5O5+
assistant