You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[2-[(2S)-2-methylpiperidin-1-ium-1-yl]acetyl]amino]-N-phenyl-5,6-dihydro-4H-cyclopenta[b]thiophene-3-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H28N3O2S+
assistant