Site Upgrade in Progress —
We are currently upgrading organicchemistrydata.org to meet WCAG 2.1 AA accessibility standards.
This process involves significant reworking of over 2,500 pages across multiple collections.
While we are working to ensure a smooth transition, some resources may be temporarily affected.
If you encounter any issues, please
let us know.
Matching ring compounds to their names
In the box following each question below enter a letter designating one of the structures (a to h). If there is no structure that fits the specified name, enter x for none.