| Answer | Crossword Clue |
|---|---|
| pyrone | either of two heterocyclic ketones having the formula C5H4O2 |
| pyrones | either of two heterocyclic ketones having the formula C5H4O2 |
| ionone | light-yellow to colorless, slightly water-soluble liquid that is either one or a mixture of two unsaturated ketones having the formula C13H20O, used chiefly in perfumery |
| ionones | light-yellow to colorless, slightly water-soluble liquid that is either one or a mixture of two unsaturated ketones having the formula C13H20O, used chiefly in perfumery |
| pyran | either of two compounds having the formula C5H6O, containing one oxygen and five carbon atoms arranged in a six-membered ring |
| pyrans | either of two compounds having the formula C5H6O, containing one oxygen and five carbon atoms arranged in a six-membered ring |
