You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by 3-[[(2S)-2-[2-(6-carbamimidoyl-3-ethyl-1H-indol-2-yl)ethyl]pyrrolidin-2-yl]methyl]-1-benzothiophene-2-carboxamide ?
user
C27H31N5OS
assistant