Resin acids. I. An improved method of isolation of resin acids the isolation of a new abietic-type acid, neoabietic acid
Harris, G.C.; Sanderson, T.F.
Journal of the American Chemical Society 70(1): 334-339
An improved method, based on the amine salt technique, for the isolation of abietic acid from acid-isomerized wood rosin and levopimaric acid from the gum oleoresin of Pinus palustris is described. The isolation of a new, abietic-type acid, termed neoabietic acid, from heat-isomerized abietic acid, the gum oleoresin of Pinus palustris and gum rosin is described. The ultraviolet absorption spectra, utilizing speciuc absorption coefficients, a, have been determined for each of the three abietic-type acids.