You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-methyl-1-[(5-thiophen-2-yl-2-thiophen-3-ylthieno[2,3-d]pyrimidin-4-yl)amino]pyrrole-2,5-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H12N4O2S3
assistant