You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance [2-[(5-chlorothiophen-2-yl)methyl-methylamino]-2-oxoethyl] 3-amino-4,6-dimethylthieno[2,3-b]pyridine-2-carboxylate .
user
C18H18ClN3O3S2
assistant