10c Polycyclic Hydrocarbon (IMAGE) Hokkaido University Caption This is the chemical structure of the compound which showed the longest C-C bond. Credit Ishigaki Y. et al., <i>Chem</i>, March 8, 2018. Usage Restrictions This image is copyrighted and can be used for reporting this press release if properly credited. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.