1. C00716 compound   Serine
                      3-Hydroxyalanine
                      2-Amino-3-hydroxypropionic acid

2. C00065 compound   L-Serine
                      L-3-Hydroxy-alanine
                      L-2-Amino-3-hydroxypropionic acid

3. C00740 compound   D-Serine

4. C00979 compound   O-Acetyl-L-serine
                      O3-Acetyl-L-serine

5. C01005 compound   3-Phosphoserine
                      L-O-Phosphoserine
                      O-Phospho-L-serine

6. C02189 compound   Protein serine

7. C02703 compound   L-Serine O-sulfate

8. C02737 compound   Phosphatidylserine
                      Phosphatidyl-L-serine
                      O3-Phosphatidyl-L-serine
                      3-O-sn-Phosphatidyl-L-serine
                      1,2-Diacyl-sn-glycerol 3-phospho-L-serine

9. C03015 compound   O-Carbamoyl-L-serine

10. C03872 compound   Serine phosphoethanolamine
                      L-Serine-phosphoethanolamine

11. C04204 compound   N-(2,3-Dihydroxybenzoyl)-L-serine
                      2,3-Dihydroxy-N-benzoyl-L-serine

12. C06395 compound   [Protein]-L-serine

13. C06396 compound   [Protein]-D-serine

14. C03637 compound   Protein serine D-xyloside

15. C04128 compound   Low-density lipoprotein L-serine

16. C04198 compound   Inhibitor of serine endopeptidase

17. C05821 compound   tri-(N-(2,3-dihydroxybenzoyl)-L-serine)-ester
                      tri-(2,3-dihydroxy-N-benzoyl-L-serine)-ester
                      Enterobactin
                      Enterochelin

18. C06446 compound   2-N,6-N-Bis(2,3-dihydroxy-N-benzoyl)-L-serine

19. C04565 compound   Low-density lipoprotein O-phospho-L-serine

20. C04776 compound   D-Galactosyl-3-(N-acetyl-beta-D-galactosaminyl)-L-serine

21. C06447 compound   2-N,6-N-Bis(2,3-dihydroxy-N-benzoyl)-L-serine amide