1. 2,3,4-Trihydroxybenzaldehyde

2. 2,3,4-Trimethoxybenzaldehyde

3. 2,3-Dihydroxybenzaldehyde

4. 2,4,6-Triethoxy-benzaldehyde

5. 2,4,6-Trimethoxybenzaldehyde

6. 2,4-Dihydroxy-isophthalaldehyde

7. 2,4-Dimethoxy.benzaldehyde

8. 2,5-Dihydroxy-terephthalaldehyde

9. 2,5-Dimethoxybenzaldehyde

10. 2-Acetoxy-3-methoxy-benzaldehyde

11. 2-Carboxymethoxybenzaldehyde

12. 2-Hydroxy-1-naphthaldehyde

13. 2-Hydroxy-4,6-dimethyl-benzaldehyde

14. 2-Hydroxy-isophthalaldehyde

15. 2-Methyl-benzaldehyde

16. 3,5-Dihydroxy-benzaldehyde

17. 3,5-Dimethoxy-benzaldehyde

18. 3-Acetyl-2,6-dihydroxy-benzaldehyde

19. 3-Hydroxy-4-phenoxy-benzaldehyde

20. 4-Ethylbenzaldehyde

21. 4-Hydroxy-5-methyl-isophthalaldehyde

22. 4-Hydroxy-isophthalaldehyde

23. 4-Methoxysalicylaldehyde

24. 5-Methoxysalicylaldehyde

25. 5-Phenyl-2-penten-4-ynal

26. 6-Hydroxy-benzo[1,3]dioxole-5-carbaldehyde

27. Anise aldehyde

28. Anthranilic aldehyde

29. Asaraldehyde

30. Atranol

31. Benzenepropiolaldehyde

32. Benzoic aldehyde

33. beta-Orcinaldehyde

34. beta-Resorcylaldehyde

35. Cortex aldehyde

36. Dillapional

37. Ethyl 4-formylbenzoate

38. Ethyl vanillin

39. Eudesmaldehyde

40. Gallaldehyde

41. Gentisaldehyde

42. Homoanisaldehyde

43. Isophthalaldehyde

44. Isovanillin

45. m-Formylphenol

46. m-Tolyl aldehyde

47. Mesitaldehyde

48. meta-Anisaldehyde

49. o-Anisaldehyde

50. o-Phthalaldehyde

51. o-Veratraldehyde

52. Orthovanillin

53. Oxy-beta-Orcinaldehyde

54. p-Formylphenol

55. p-t-Butylbenzaldehyde

56. p-Tolyl aldehyde

57. Phloroglucinaldehyde

58. Phthalaldehydic acid

59. Piperonal

60. Protocatechuic aldehyde

61. Salicyl aldehyde

62. Stictic acid

63. Syringaaldehyde

64. Terephthalaldehyde

65. Terephthalaldehydic acid

66. Vanillin

67. Vanillin acetate

68. Veratraldehyde