1 MAA N-methyl-L-alanine 1.000 2 33X N-methyl-D-alanine 1.000 3 DAM N-methyl-alpha-beta-dehydroalanine 1.000 4 5JP N-methyl-L-serine 0.875 5 DSE N-methyl-D-serine 0.875 6 LAL N,N-dimethyl-L-alanine 0.875 7 MDH N-methyldehydrobutyrine 0.875 8 NCY N-methylcysteine 0.875 9 SAR Sarcosine 0.857 10 0FL 3-amino-N-formyl-L-alanine 0.778 11 AYA N-acetylalanine 0.778 12 MV9 (2~{R})-3-methyl-2-(methylamino)butanoic acid 0.778 13 MVA N-methylvaline 0.778 14 N2C N,S-dimethylcysteine 0.778 15 NCB N-carbamoyl-alanine 0.778 16 NXA N-carboxyalanine 0.778 17 NZC N-methylidene-L-threonine 0.778 18 SNM N,N-dimethyl-L-serine 0.778 19 DMG N,N-dimethylglycine 0.750 20 KG7 (2e)-2-(hydroxyimino)propanoic acid 0.750 21 ZZJ N^2^-methyl-L-alaninamide 0.750 22 A1BXY Prop-2-ynoic acid 0.714 23 AKR Acrylic acid 0.714 24 DK6 Propane-1,1-diol 0.714 25 PPI Propanoic acid 0.714 26 2QZ N,N-dimethyl-L-threonine 0.700 27 66E N-ethyl-L-valine 0.700 28 9KK N-methyl norleucine 0.700 29 DNM N-methyl-D-norleucine 0.700 30 FVA N-formyl-L-valine 0.700 31 GZJ (2s)-2-(acetylamino)butanoic acid 0.700 32 IML N-methyl-isoleucine 0.700 33 J3D N-carboxy-L-cysteine 0.700 34 MLE N-methylleucine 0.700 35 MLU N-methyl-D-leucine 0.700 36 MME N-methyl methionine 0.700 37 O7G N,N-dimethyl-L-valine 0.700 38 OEM N-methyl-D-aspartic acid 0.700 39 OTH N,O-dimethyl-L-threonine 0.700 40 SAC N-acetyl-serine 0.700 41 SC2 N-acetyl-L-cysteine 0.700 42 SOQ N-methyl-L-aspartic acid 0.700 43 WZJ N-methyl-L-alloisoleucine 0.700