(S)-1-((S)-2-methyl-3-(((2,6,7-trimethyl-3,5-dioxo-3,5-dihydropyrazolo[1,2-a]pyrazol-1-yl)methyl)thio)propanoyl)pyrrolidine-2-carboxylic acid
(S)-1-((S)-2-methyl-3-(((2,6,7-trimethyl-3,5-dioxo-3,5-dihydropyrazolo[1,2-a]pyrazol-1-yl)methyl)thio)propanoyl)pyrrolidine-2-carboxylic acid