1. C00141 compound   2-Oxoisopentanoate
                      2-Oxoisovalerate
                      2-Oxo-3-methylbutanoate
                      3-Methyl-2-oxobutanoate
                      3-Methyl-2-oxobutanoic acid
                      3-Methyl-2-oxobutyric acid
                      2-Ketovaline
                      alpha-Ketovaline
                      2-Keto-3-methylbutyric acid

2. C00161 compound   2-Oxo acid

3. C00349 compound   2-Methyl-3-oxopropanoate
                      3-Oxo-2-methylpropanoate
                      Methylmalonate semialdehyde

4. C01110 compound   2-Oxo-5-aminopentanoate
                      2-Oxo-5-aminovalerate
                      5-Amino-2-oxopentanoate
                      2-Oxo-5-amino-pentanoate
                      5-Amino-2-oxopentanoic acid
                      alpha-Keto-delta-aminopentanoate

5. C01226 compound   (15Z)-12-Oxophyto-10,15-dienoate
                      (15Z)-12-Oxophyto-10,15-dienoic acid
                      12-Oxo-10,15(Z)-phytodienoic acid
                      9(S),13(S)-12-Oxo-PDA

6. C01656 compound   3-Oxo acid
                      3-Oxy acid
                      3-Oxygen acid

7. C02237 compound   5-Oxo-D-proline
                      D-Pyroglutamic acid
                      D-5-Pyrrolidone-2-carboxylic acid

8. C02238 compound   5-Oxo-L-proline
                      L-Pyroglutamic acid
                      L-5-Pyrrolidone-2-carboxylic acid

9. C02942 compound   3-Oxo-hydroxysteroid

10. C02952 compound   5-Oxo-1,2-campholide

11. C03239 compound   2-Oxo-6-aminocaproate
                      6-Amino-2-oxohexanoate

12. C03465 compound   2-Oxo-3-methylvalerate
                      3-Methyl-2-oxopentanoate

13. C03467 compound   3-Oxo-4-methylpentanoate
                      (R)-4-Methyl-3-oxopentanoate
                      3-Oxo-4-methylpentanoic acid

14. C03771 compound   2-Oxo-5-guanidinopentanoate
                      5-Guanidino-2-oxopentanoate
                      2-Oxo-5-guanidino-pentanoate
                      5-Guanidino-2-oxo-pentanoate

15. C04181 compound   2-Oxo-3-hydroxyisovalerate
                      3-Hydroxy-3-methyl-2-oxobutanoate
                      3-Hydroxy-3-methyl-2-oxobutanoic acid

16. C05548 compound   2-Oxo-6-acetamidocaproate
                      6-Acetamido-2-oxohexanoate

17. C06008 compound   (R)-2-Oxo-3-methylpentanoate
                      (3R)-3-Methyl-2-oxopentanoic acid
                      (R)-2-Oxo-3-methylpentanoic acid

18. C06237 compound   (R)-2-Oxo-3-hydroxyisovalerate
                      (R)-3-Hydroxy-3-methyl-2-oxobutanoate

19. C00619 compound   3-Oxo-delta4-steroid

20. C00683 compound   (S)-2-Methyl-3-oxopropanoyl-CoA
                      (S)-2-Methyl-3-oxopropionyl-CoA
                      (S)-3-oxo-2-methylpropanoyl-CoA
                      (S)-Methylmalonyl-CoA
                      (S)-Methylmalonyl-coenzyme A

21. C00688 compound   dTDP-4-oxo-L-rhamnose
                      dTDP-4-oxo-6-deoxy-L-mannose
                      dTDP-4-dehydro-6-deoxy-L-mannose

22. C00972 compound   Aromatic oxo acid

23. C01034 compound   3-Oxo-delta5-steroid

24. C01213 compound   (R)-2-Methyl-3-oxopropanoyl-CoA
                      (R)-2-Methyl-3-oxopropionyl-CoA
                      (R)-3-Oxo-2-methylpropanoyl-CoA
                      (R)-Methylmalonyl-CoA

25. C02797 compound   3-Oxo-5beta-steroid

26. C02940 compound   3-Oxo-5alpha-steroid

27. C02941 compound   3-Oxo-delta1-steroid

28. C03070 compound   3-Oxo-5beta-cholanate

29. C03586 compound   3-Oxoadipate enol-lactone
                      2-Oxo-2,3-dihydrofuran-5-acetate
                      4,5-Dihydro-5-oxofuran-2-acetate
                      5-Oxo-4,5-dihydrofuran-2-acetate

30. C03680 compound   4,5-Dihydro-4-oxo-5-imidazolepropanoate
                      4-Imidazolone-5-propanoate
                      4-Imidazolone-5-propionic acid

31. C04105 compound   2,5-Dihydro-5-oxofuran-2-acetate
                      2-Oxo-2,5-dihydrofuran-5-acetate
                      5-Oxo-2,5-dihydrofuran-2-acetate
                      Muconolactone
                      4-Carboxymethyl-4-hydroxyisocrotonolactone

32. C04236 compound   2-Oxo-4-methyl-3-carboxypentanoate
                      3-Carboxy-4-methyl-2-oxopentanoate

33. C05344 compound   GDP-4-oxo-L-rhamnose
                      GDP-4-oxo-6-deoxy-L-mannose
                      GDP-4-dehydro-6-deoxy-L-mannose

34. C05364 compound   4-Carboxy-2-oxo-3-hexenedioate

35. C05389 compound   GDP-4-oxo-L-fucose
                      GDP-4-dehydro-L-fucose

36. C05601 compound   4-Hydroxy-2-oxo-heptanedioate
                      4-Hydroxy-2-oxoheptanedioic acid
                      4-Hydroxy-2-ketopimelate

37. C05854 compound   4-Carboxy-2-oxo-4-pentanoate

38. C05941 compound   2-Oxo-4-hydroxy-5-aminovalerate

39. C06019 compound   3-Oxohexulose 6-phosphate
                      3-Oxo-6-phospho-hexulose

40. C06054 compound   2-Oxo-3-hydroxy-4-phosphobutanoate
                      alpha-Keto-3-hydroxy-4-phosphobutyrate

41. C06627 compound   4-Dedimethylamino-4-oxo-anhydrotetracycline

42. C07159 compound   2-Oxo-delta3-4,5,5-trimethylcyclopentenylacetate
                      2-Oxo-delta3-4,5,5-trimethylcyclopentenylacetic acid

43. C07335 compound   2-Amino-3-oxo-4-phosphonooxybutyrate
                      L-2-Amino-3-oxo-4-phosphonooxybutyrate

44. C08319 compound   4-Oxo-9,11,13-octadecatrienoic acid
                      (9Z,11E,13E)-4-Oxooctadeca-9,11,13-trienoic acid
                      4-Oxo-cis-9,trans-11,trans-13-octadecatrienoic acid
                      alpha-Licanic acid

45. C10976 compound   1-Oxa-2-oxo-3-methylcycloheptane

46. C12314 compound   1-Oxa-2-oxo-3-hydroxycycloheptane

47. C13816 compound   (9R,13R)-12-Oxo-phytodienoic acid
                      (9R,13R)-12-Oxo-phyto-10Z,15Z-dienoic acid
                      (10Z,15Z)-(9R,13R)-12-Oxophyto-10,15-dienoic acid

48. C01222 compound   GDP-4-oxo-6-deoxy-D-mannose
                      GDP-4-dehydro-D-rhamnose
                      GDP-4-dehydro-6-deoxy-D-mannose
                      GDP-4-dehydro-6-deoxy-D-talose

49. C01273 compound   2,6-Dioxo-6-phenylhexa-3-enoate
                      2-Hydroxy-6-oxo-6-phenylhexa-2,4-dienoate

50. C02137 compound   alpha-Oxo-benzeneacetic acid
                      Benzoylformate
                      Phenylglyoxylate
                      Benzoylformic acid
                      Phenylglyoxylic acid

51. C02636 compound   3-Carboxy-N,N,N-trimethyl-2-oxo-1-propanaminium
                      3-Dehydrocarnitine

52. C03927 compound   3-Hydoxy-4-oxo-4H-pyrid-4-one

53. C04089 compound   UDP-4-oxo-6-deoxy-D-glucose
                      UDP-4-dehydro-6-deoxy-D-glucose
                      UDP-4-keto-6-deoxy-D-glucose

54. C04166 compound   (+/-)-6-Hydroxy-3-oxo-alpha-ionol

55. C04223 compound   (+/-)-6-Hydroxy-3-oxo-alpha-ionone

56. C04522 compound   2-Chloro-2,5-dihydro-5-oxofuran-2-acetate
                      2-Chloro-5-oxo-2,5-dihydrofuran-2-acetate
                      5-Chloro-2,5-dihydro-2-oxofuran-5-acetate

57. C04577 compound   15-Oxo-5,8,11-cis-13-trans-eicosatetraenoate
                      15-Oxo-5,8,11-cis-13-trans-icosatetraenoate

58. C05255 compound   2-Amino-4-oxo-6-(1',2'-dioxoprolyl)-7,8-dihydroxypteridine

59. C06210 compound   2-Hydroxy-6-oxo-hept-2,4-dienoate
                      2-Hydroxy-6-keto-2,4-heptadienoate

60. C06582 compound   2-Hydroxy-6-oxo-7-methylocta-2,4-dienoate

61. C06622 compound   dTDP-4-oxo-2,6-dideoxy-L-glucose

62. C06725 compound   5,6-Dihydroxy-3-methyl-2-oxo-1,2-dihydroquinoline

63. C06726 compound   5,6-Dihydroxy-3-methyl-2-oxo-1,2,5,6-tetrahydroquinoline

64. C07123 compound   2-Hydroxy-6-oxo-octa-2,4-dienoate

65. C07160 compound   2-Oxo-delta3-4,5,5-trimethylcyclopentenylacetyl-CoA
                      2-Oxo-delta3-4,5,5-trimethylcyclopentenylacetyl coenzyme A

66. C07479 compound   2-Oxo-5-methyl-cis-muconate

67. C08476 compound   4-oxo-4H-pyran-2,6-dicarboxylic acid
                      Chelidonic acid

68. C09825 compound   6-Oxo-2-hydroxycyclohexane-1-carboxyl-CoA

69. C11402 compound   (4R,7R)-4-Isopropenyl-7-methyl-2-oxo-oxepanone

70. C11403 compound   (3S,6R)-6-Isopropenyl-3-methyl-2-oxo-oxepanone

71. C11414 compound   (4S,7R)-4-Isopropenyl-7-methyl-2-oxo-oxepanone

72. C11418 compound   (3S,6S)-6-Isopropenyl-3-methyl-2-oxo-oxepanone

73. C11452 compound   dTDP-4-oxo-alpha-L-rhamnose

74. C11460 compound   dTDP-4-oxo-5-C-methyl-L-rhamnose
                      dTDP-4-oxo-6-deoxy-5-C-methyl-L-mannose

75. C11907 compound   dTDP-4-oxo-6-deoxy-D-glucose
                      4,6-Dideoxy-4-oxo-dTDP-D-glucose
                      dTDP-4-dehydro-6-deoxy-D-glucose

76. C11908 compound   dTDP-3-oxo-6-deoxy-D-glucose
                      3,6-Dideoxy-3-oxo-dTDP-D-glucose

77. C11909 compound   dTDP-3-oxo-4,6-dideoxy-D-glucose

78. C11922 compound   dTDP-4-oxo-2,6-dideoxy-D-glucose

79. C11926 compound   dTDP-4-oxo-6-deoxy-D-allose

80. C11927 compound   dTDP-4-oxo-2,6-dideoxy-L-mannose

81. C11928 compound   dTDP-4-oxo-2,6-dideoxy-D-allose

82. C00687 compound   dTDP-4-oxo-6-deoxy-alpha-D-glucose
                      dTDP-4-dehydro-6-deoxy-alpha-D-glucose

83. C04462 compound   (S)-2-(Succinylamino)-6-oxoheptanedioate
                      N-Succinyl-2-L-amino-6-oxoheptanedioate
                      N-Succinyl-L-2-amino-6-oxoheptanedioate
                      N-Succinyl-L-2-amino-6-oxopimelate
                      N-Succinyl-2-amino-6-oxo-L-pimelic acid
                      N-Succinyl-epsilon-keto-L-aminopimelic acid

84. C04676 compound   3-Oxo-13,17-secoandrost-4-ene-17,13alpha-lactone
                      Testololactone

85. C04780 compound   8-[(1R,2R)-3-Oxo-2-{(Z)-pent-2-enyl}cyclopentyl]octanoate
                      OPC-8:0

86. C05165 compound   2-Amino-5-oxocyclohex-1-enecarbonyl-CoA
                      2-Amino-5-oxo-cyclohex-1-enecarboxy-CoA

87. C05253 compound   2-Amino-4-oxo-6-(1',2',3'-trihydroxypropyl)-diquinoid-7,8- dihydroxypterin

88. C05949 compound   5-Hydroxy-12-oxo-delta5,8,11,14-eicosapolyenoic acid
                      12-Keto-LTB4
                      12-Keto-leukotriene B4

89. C06581 compound   2-Hydroxy-3-carboxy-6-oxo-7-methylocta-2,4-dienoate

90. C06587 compound   2-Hydroxy-6-oxo-6-(4'-chlorophenyl)-hexa-2,4-dienoate

91. C06617 compound   dTDP-3-oxo-6-deoxy-alpha-D-glucose

92. C06618 compound   dTDP-3-oxo-4,6-dideoxy-alpha-D-glucose

93. C06621 compound   dTDP-4-oxo-2,6-dideoxy-alpha-D-glucose

94. C06626 compound   4-Dedimethylamine-4-oxo-anhydro-7-Cl-tetracycline

95. C06645 compound   6-Oxo-2-hydroxy-7-(4'-chlorophenyl)-3,8,8-trichloroocta-2E,4E,7E- trienoate

96. C06651 compound   6-Oxo-2-hydroxy-7-(4'-chlorophenyl)-3,8,8,8-tetrachloroocta-2E,4E- dienoate

97. C07731 compound   2-Hydroxy-6-oxo-6-(2-hydroxyphenyl)-hexa-2,4-dienoate

98. C07734 compound   2-Hydroxy-6-oxo-6-(2-hydroxyphenoxy)-hexa-2,4-dienoate

99. C08062 compound   2-Hydroxy-6-oxo-(2'-aminophenyl)-hexa-2,4-dienoate

100. C08298 compound   alpha-Amino-3-oxo-5-isoxazolidineacetic acid
                      Tricholomic acid

101. C08672 compound   Veatchine,15-deoxy-16,17-dihydro-15-oxo-, (16-beta,20S)-
                      Cuauchichicine

102. C11915 compound   dTDP-3-methyl-4-oxo-2,6-dideoxy-L-glucose

103. C11948 compound   2,6-Dimethyl-5-methylene-3-oxo-heptanoyl-CoA

104. C01292 compound   3alpha,7alpha-Dihydroxy-12-oxo-5beta-cholanate

105. C04643 compound   3alpha,12alpha-Dihydroxy-7-oxo-5beta-cholanate

106. C04771 compound   (S)-2-Amino-3-(3-hydoxy-4-oxo-4H-pyridin-1-yl)propanoate
                      L-Mimosine

107. C05254 compound   2-Amino-4-oxo-6-(erythro-1',2',3'-trihydroxypropyl)-7,8- dihydroxypteridine triphosphate

108. C05473 compound   11beta,21-Dihydroxy-3,20-oxo-5beta-pregnan-18-al

109. C06623 compound   dTDP-4-oxo-3-methyl-2,6-dideoxy-beta-L-glucose

110. C10969 compound   1-(4'-chlorophenyl)-1,4-dihydro-4-oxo-5-propoxycinnoline-3- carboxylic acid
                      SC-1271

111. C11830 compound   13(1)-Oxo-Mg-protoporphyrin IX 13-monomethyl ester
                      13(1)-Oxo-magnesium-protoporphyrin IX 13-monomethyl ester

112. C12248 compound   5-Hydroxy-2-oxo-4-ureido-2,5-dihydro-1H-imidazole-5-carboxylate

113. C14095 compound   3-(3-Carboxy-3-oxo-1-propenyl)-2-hydroxy-benzoic acid
                      2-Hydroxy-3-carboxybenzalpyruvate

114. C05474 compound   3alpha,11beta,21-Trihydroxy-20-oxo-5beta-pregnan-18-al

115. C08491 compound   {(1R,2R)-3-Oxo-2-[(Z)pent-2-enyl]cyclopent-2-enyl}acetic acid
                      Jasmonate
                      (-)-Jasmonic acid
                      Jasmonic acid

116. C09946 compound   3-(Aminomethylene)-alpha-ethenyltetrahydro-4-hydroxy-2-oxo-2H-pyran- 4-acetaldehyde
                      Enicoflavine

117. C11448 compound   3,4-Dihydro-7-methoxy-2-methylene-3-oxo-2H-1,4-benzoxazine-5- carbonyl-CoA
                      Benzoxazolinyl-CoA

118. C11468 compound   3,4-Dihydro-7-methoxy-2-methylene-3-oxo-2H-1,4-benzoxazine-5- carboxylic acid
                      Benzoxazolinate

119. C11494 compound   Methyl 2-(4-isopropyl-4-methyl-5-oxo-2-imidazolin-2-yl)-p-toluate

120. C11495 compound   Methyl 6-(4-isopropyl-4-methyl-5-oxo-2-imidazolin-2-yl)-m-toluate

121. C13898 compound   1-Palmitoyl-2-(5-hydroxy-8-oxo-6-octenedioyl)-sn-glycero-3- phosphatidylcholine

122. C13901 compound   1-Palmitoyl-2-(5-hydroxy-8-oxo-6-octenoyl)-sn-glycero-3- phosphatidylcholine

123. C13902 compound   1-Palmitoyl-2-(5-keto-8-oxo-6-octenoyl)-sn-glycero-3- phosphatidylcholine

124. C05252 compound   2-Amino-4-oxo-4-alpha-hydroxy-6-(erythro-1',2',3'-Tri- hydroxypropyl)-5,6,7,8-tetrahydroxypterin

125. C07718 compound   2-Hydroxy-4-(1-oxo-1,3-dihydro-2H-inden-2-ylidene)-but-2-enoic acid

126. C07725 compound   2-Hydroxy-4-(2-oxo-1,3-dihydro-2H-inden-1-ylidene)but-2-enoic acid

127. C11930 compound   dTDP 1-ester with (6R)-5,6-dihydro-4-hydroxy-6-methyl-5-oxo-2H-pyran

128. C11931 compound   dTDP 1-ester with (6S)-5,6-dihydro-4-hydroxy-6-methyl-5-oxo-2H-pyran

129. C12434 compound   4-Dihydro-9-hydroxy-1-methyl-10-oxo-3-H-naphtho[2,3-c]pyran-3-acetic acid
                      (S)-DNPA

130. C13422 compound   [2-[(11,17-dihydroxy-10,13-dimethyl-3-oxo- 1,2,6,7,8,9,10,11,12,13,14,15,16,17- tetradecahydrocyclopenta[a]phenanthren-17-yl)]-2-oxo-ethyl]
                      Hydrocortisone caproate

131. C07662 compound   cis-5-Amino-1-cyclopropyl-7-(3,5-dimethyl-1-piperazinyl)-6,8- difluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid
                      Sparfloxacin
                      Zagam

132. C12650 compound   (1-(5-Deoxy-beta-D-ribofuranosyl)-5-fluoro-1,2-dihydro-2-oxo-4- pyrimidinyl)-carbamic acid pentyl ester
                      Capecitabine
                      Xeloda

133. C11083 compound   Benzoic acid, 2-(4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl)- 4(or 5)-methyl-, methyl ester
                      Assert
                      Imazamethabenz
                      Imazamethabenz-methyl

134. C14049 compound   Dipotassium (3beta,20beta)-20-carboxy-11-oxo-30-norlean-12-en-3-yl-2-O-beta-D- gucopyranuronosyl-alpha-D-glucopyranosiduronate
                      Neubormitin
                      Dipotassium glycyrrhizate
                      Glycyrrhizinate dipotassium

135. C06488 compound   [4R-(4alpha,5alpha,6beta,7beta)]-3,3'-[[Tetrahydro-5,6-dihydroxy-2- oxo-4,7-bis(phenylmethyl)-1H-1,3-diazepine-1,3(2H)- diyl]bis(methylene)]bis[N-2-thiazolylbenzamide]
                      XV638