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 (2R)-1-(4-ethylpiperazin-1-yl)-2-[[4-(2-methoxyethyl)-5-pyridin-4-yl-1,2,4-triazol-3-yl]sulfanyl]propan-1-one .
user
C19H28N6O2S
assistant