You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-hydroxy-4-methyl-2-oxo-5-[2-[(5Z)-4-oxo-2-sulfanylidene-5-(thiophen-2-ylmethylidene)-1,3-thiazolidin-3-yl]acetyl]-1-pentylpyridine-3-carbonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H21N3O4S3
assistant