You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[2-[2-[2-[2-[(2,5-dithiophen-2-ylthiophene-3-carbonyl)amino]ethoxy]ethoxy]ethoxy]ethylamino]-4-oxobutanoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H30N2O7S3
assistant