Not Less Than - 95%
(S)-1-(adamantan-1-ylglycyl)pyrrolidine-2-carbonitrile;2-Pyrrolidinecarbonitrile,1-[2-(tricyclo[3.3.1.13,7]dec-1-ylamino)acetyl]; (S)-1-(2-(adamantan-1-ylamino)acetyl)pyrrolidine-2-carbonitrile