You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R)-2-[4-[(3,4-dimethoxyphenyl)methyl]piperazine-1,4-diium-1-yl]-N-(2-methoxyphenyl)propanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H33N3O4+2
assistant