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)-3-(3,5-dimethyl-1H-pyrazol-4-yl)-2-methyl-1-[(2R,4R)-2-methyl-4-thiophen-3-ylpyrrolidin-1-yl]propan-1-one .
user
C18H25N3OS
assistant