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| # | Species | Formula |
| 924 | Dimethyl acetal | C4H10O2 | |
| 925 | 1,4 Butandiol | C4H10O2 | |
| 926 | Acetylacetone | C5H8O2 | |
| 927 | Ethyl propionate | C5H10O2 | |
| 928 | Isopropyl acetate | C5H10O2 | |
| 929 | 1,5 Pentandiol | C5H12O2 | |
| 930 | p-Benzoquinone | C6H4O2 | |
| 931 | p-Benzoquinone (Geo) | C6H4O2 | |
| 932 | Hydroquinone | C6H6O2 | |
| 933 | Resorcinol | C6H6O2 | |
| 934 | 1,2-Benzenediol | C6H6O2 | |
| 935 | 1,3-Cyclohexanedione | C6H8O2 | |
| 936 | 1,4-Cyclohexanedione | C6H8O2 | |
| 937 | 2-Oxepanone | C6H10O2 | |
| 938 | 2,4-Hexanedione | C6H10O2 | |
| 939 | Ethyl-(E)-2-butenoate | C6H10O2 | |
| 940 | 3-Methyl-2,4-pentandione | C6H10O2 | |
| 941 | 4-Hydroxy-4-methylpentan-2-one | C6H12O2 | |
| 942 | 1,1-Dimethoxy-2-butene | C6H12O2 | |
| 943 | Ethyl butanoate | C6H12O2 | |
| 944 | 5,5-Dimethyl-1,3-dioxane | C6H12O2 | |
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