| Member | Definition | Role |
|---|
| 2-amino-3-ketobutyrate | An alpha-amino acid that is acetoacetic acid which is substituted by an amino group at position 2. | 2-amino-3-oxobutanoic acid |
| 2-methyl-3-oxovaleric acid | A 3-oxo monocarboxylic acid that is valeric acid substituted by a methyl group at position 2 and a keto group at position 3. | 2-methyl-3-ketovaleric acid |
| 2-methylacetoacetic acid | A 3-oxo monocarboxylic acid that is acetoacetic acid which is substituted at position 2 by a methyl group. | 2-methylacetoacetic acid |
| flumequine | A member of the class of pyridoquinolines that is 1-oxo-6,7-dihydro-1H,5H-pyrido[3,2,1-ij]quinoline carrying additional carboxy, methyl and fluoro substituents at positions 2, 5 and 9 respectively. | 9-fluoro-5-methyl-1-oxo-6,7-dihydro-1H,5H-pyrido[3,2,1-ij]quinoline-2-carboxylic acid |
| ofloxacin | An oxazinoquinoline that is 2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinolin-7-one substituted by methyl, carboxy, fluoro, and 4-methylpiperazin-1-yl groups at positions 3, 6, 9, and 10, respectively. | 9-fluoro-3-methyl-10-(4-methylpiperazin-1-yl)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic acid |
| sordaricin | A tetracyclic diterpenoid that is produced by several fungi including Sordaria araneosa. | sordaricin |
| tartronate semialdehyde | | 2-hydroxy-3-oxopropanoic acid |