You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (2S)-2-[(4-cyclopropyl-5-thiophen-2-yl-1,2,4-triazol-3-yl)sulfanyl]-1-(1H-indol-3-yl)propan-1-one .
user
C20H18N4OS2
assistant