You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(2R,5S)-4-acetyl-2-benzyl-5-[(7-methoxy-1,3-benzodioxol-5-yl)methyl]piperazin-1-yl]ethanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H28N2O5
assistant