A cyclic ketone in which the carbocyclic ring structure which may be saturated or unsaturated, but may not be a benzenoid or other aromatic system.
| Member | Definition | Role |
|---|
| 17-phenyltrinorprostaglandin e2 | A prostanoid that is 18,19,20-trinor-prostaglandin E2 in which one of the terminal methyl hydrogens has been replaced by a phenyl group. | 17-phenyl-18,19,20-trinor-prostaglandin E2 |
| 2-methoxyestrone | A 17-oxo steroid that is estrone in which the hydrogen at position 2 has been replaced by a methoxy group. | 2-methoxyestrone |
| anticapsin | An alanine derivative that is L-alanine bearing a 5-oxo-7-oxabicyclo[4.1.0]hept-2-yl substituent at position 3. | anticapsin zwitterion; anticapsin |
| cyclopentenone | An enone that is cyclopentanone having a C=C double bond at position 2. | 2-cyclopenten-1-one |
| paeoniflorigenone | A terpenoid with formula C17H18O6, isolated from several species of Paeoniae. | paeoniflorigenone |
| petasin | An enoate ester obtained by formal condensation of the carboxy group of angelic acid with the hydroxy group of (1R,2R,7S,8aR)-1,8a-dimethyl-6-oxo-7-(prop-1-en-2-yl)-1,2,3,4,6,7,8,8a-octahydronaphthalen-2-ol. | petasin |
| squaric acid | A carbon oxoacid that consists of 1,2-diketocyclobut-3-ene bearing two enolic hydroxy substituents at positions 3 and 4. | squaric acid |