Figure 1From: 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 ambersStructures of trans-trans, trans-bicadinane (I), cis-cis-trans-bicadinane (II) and polycadinene (as proposed by van Aarssen et al. [12]) (III).Back to article page