You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3S)-3-(6-ethyl-2,3-dihydropyrrolo[3,2-b]pyridin-1-yl)-N-methyl-3-thiophen-3-ylpropan-1-amine by IUPAC nomenclature, provide its molecular formula.
user
C17H23N3S
assistant