1 A3M 2-amino-3-methyl-1-pyrrolidin-1-yl-butan-1-one 1.000 2 GK2 [(2~{R})-1-[(2~{R})-2-azanyl-3-methyl-butanoyl]pyrrolidin-2-yl]boronic acid 0.800 3 7TK (3s)-3-azanyl-4-oxidanylidene-4-pyrrolidin-1-yl-butanoic acid 0.786 4 WKM (2s)-2-amino-3-methyl-1-(morpholin-4-yl)butan-1-one 0.786