You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[1-[5-[2-[(dimethylamino)methyl]phenyl]thiophen-2-yl]ethyl]-4-ethyl-6,7-dimethylphthalazin-1-amine into molecular formula.
user
C27H32N4S
assistant