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 3,3-dimethyl-1-[(4R)-4-[(3R)-3-(pyridin-4-ylmethyl)pyrrolidine-1-carbonyl]-1,3-thiazolidin-3-yl]butan-1-one .
user
C20H29N3O2S
assistant