| Compound | Description |
|---|---|
| hydronium ion | |
| acetic acid | Product of the oxidation of ethanol and of the destructive distillation of wood. It is used locally, occasionally internally, as a counterirritant and also as a reagent. (Stedman, 26th ed) |
| zeatin | An aminopurine factor in plant extracts that induces cell division. (Grant & Hackh's Chemical Dict, 5th ed) |