You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as tert-butyl 4-[3-[[N-ethyl-N'-(thiophen-2-ylmethyl)carbamimidoyl]amino]propyl]piperazine-1-carboxylate using the IUPAC nomenclature.
user
C20H35N5O2S
assistant