You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 2-[3-[4-[(3,4-dichlorophenyl)methyl]piperazine-1-carbonyl]pyrazol-1-yl]propanoic acid is given. What is its corresponding molecular formula?
user
C18H20Cl2N4O3
assistant