Gas-Phase Structure of Alpha-pinene (IMAGE) American Institute of Physics Caption Gas-phase structure of alpha-pinene has been experimentally unveiled, using Fourier transform microwave spectroscopy and quantum chemical calculations. Credit Elias M. Neeman, including the picture of the forest Usage Restrictions This image may be used only with appropriate credit. 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.