Figure 13From: The nature and fate of natural resins in the geosphere. Part X.† Structural characteristics of the macromolecular constituents of modern Dammar resin and Class II ambers2D 13C-1H NMR spectra for fossil Dammar polymer. (a) HMQC, (b) and (c) HMBC and (d) COSY. Resonances due to the primary olefinic structure are indicated by dashed lines. Click on the image or here to access a larger view.Back to article page