You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (2S)-1-(2,3-dihydroindol-1-yl)-2-[(4-ethyl-5-pyridin-4-yl-1,2,4-triazol-3-yl)sulfanyl]propan-1-one ?
user
C20H21N5OS
assistant