You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-(1,1-dioxothiolan-3-yl)-3-[[N-ethyl-N'-(thiophen-2-ylmethyl)carbamimidoyl]amino]propanamide by IUPAC nomenclature, provide its molecular formula.
user
C15H24N4O3S2
assistant