label: (2S,4S)-4-fluoro-1-(2-((2-methyl-4-oxo-4-pyrrolidin-1-ylbutan-2-yl)amino)acetyl)pyrrolidine-2-carbonitrile
label_lc: (2s,4s)-4-fluoro-1-(2-((2-methyl-4-oxo-4-pyrrolidin-1-ylbutan-2-yl)amino)acetyl)pyrrolidine-2-carbonitrile