1876 J. Harley (ed. 6) 702 The resin contains a little crystallisable gurgunic [sic] acid C44 H68 O8, which appears to be a hydrate of abietinic acid.
1886 Gurjunic acid, C34 H64 O5 + 3 H2 O. A crystalline substance contained in the transparent semi-fluid resin left after the distillation of the volatile oil from gurjun balsam.