1. C00071 compound   Aldehyde

2. C00193 compound   Aromatic aldehyde

3. C00261 compound   Benzaldehyde
                      Benzoic aldehyde

4. C00376 compound   Vitamin A aldehyde
                      all-trans-Vitamin A aldehyde
                      Retinal
                      Retinene
                      all-trans-Retinal
                      all-trans-Retinene

5. C00546 compound   Pyruvaldehyde
                      2-Ketopropionaldehyde
                      Pyruvic aldehyde
                      Methylglyoxal
                      2-Oxopropanal

6. C00576 compound   Betaine aldehyde

7. C01471 compound   Acrylaldehyde
                      Acrylic aldehyde
                      Acrolein
                      Propenal

8. C02201 compound   Veratraldehyde
                      Veratric aldehyde
                      3,4-Dimethoxybenzaldehyde

9. C02278 compound   Dodecylaldehyde
                      Lauraldehyde
                      Dodecyl aldehyde
                      Dodecanal

10. C02576 compound   Perillaldehyde
                      Perillyl aldehyde

11. C02666 compound   Coniferaldehyde
                      Ferulaldehyde
                      Coniferyl aldehyde
                      4-Hydroxy-3-methoxycinnamaldehyde

12. C05585 compound   Gentisate aldehyde

13. C05608 compound   p-Coumaraldehyde
                      4-Hydroxycinnamyl aldehyde

14. C05610 compound   Sinapaldehyde
                      Sinapoyl aldehyde

15. C05856 compound   Thiamine aldehyde

16. C05918 compound   dehydroretinaldehyde
                      3-Dehydroretinaldehyde
                      Vitamin A2 aldehyde
                      Dehydroretinal
                      Dehydroretinaldehyd
                      3-Dehydroretinal
                      Retinene 2
                      a-Retinene
                      3,4-Didehydroretinal
                      all-trans-Dehydroretinal
                      trans-3-Dehydroretinal
                      3-Dehydroretinal, all-trans-
                      Retinal, 3,4-didehydro-
                      all-trans-3,4-Dehydroretinal
                      (all-E)-3,7-Dimethyl-9-(2,6,6-trimethyl-1,3-cyclohexadien-1-yl)- 2,4,6,8-nonatetraenal
                      2,4,6,8-Nonatetraenal, 3,7-dimethyl-9-(2,6,6-trimethyl-1,3-cyclohexadien-1-yl)-, (all-E)-

17. C06093 compound   Gibberellin A12 aldehyde

18. C06577 compound   Cuminaldehyde
                      p-Cumic aldehyde

19. C06613 compound   3-Chloroallyl aldehyde

20. C06661 compound   Clavulanate-9-aldehyde

21. C07214 compound   2-Methylbenzaldehyde
                      o-Tolualdehyde
                      o-toluic aldehyde
                      2-formyltoluene

22. C07327 compound   Nicotinaldehyde
                      3-Pyridinecarboxaldehyde
                      Pyridine-3-aldehyde

23. C08497 compound   Leaf aldehyde
                      2-Hexenal, (2E)-

24. C08498 compound   Lilac aldehyde

25. C10945 compound   Caffeic aldehyde
                      Caffeyl aldehyde
                      3,4-Dihydroxycinnamaldehyde

26. C11632 compound   Polyneuridine aldehyde

27. C11679 compound   4,21-Dehydrocorynantheine aldehyde

28. C11853 compound   Gibberellin A14 aldehyde

29. C11905 compound   Gibberellin A53 aldehyde

30. C13455 compound   Abscisic aldehyde

31. C00609 compound   Long-chain aldehyde

32. C02110 compound   11-cis-Vitamin A aldehyde
                      11-cis-Retinal
                      11-cis-Retinene

33. C05665 compound   beta-Aminopropion aldehyde

34. C07345 compound   Betaine aldehyde hydrate

35. C14044 compound   C25-Allenic-apo-aldehyde

36. C14045 compound   C25-Epoxy-apo-aldehyde