One of its components, pimaric acid (PiMA), has been shown to suppress LPS-stimulated production of key inflammatory markers such as NO, [PGE.
Pimaric acid from Aralia cordata has an inhibitory effect on TNF-alpha-induced MMP-9 production and HASMC migration via down-regulated NF-kappaB and AP-1.
An important presence of dehidroabietic acid was also found in all the sampling stations of the BioBio Canyon except the most oceanic one (B-8), and even pimaric
acid was present in one station (B-5), indicating probable deposition of higher plant resins (Volkman & Holdsworth, 1993; Bums et al.
The resin is a typical non-modified colophony resin, mainly composed by abietic and pimaric acids (90 wt%), with softening point of 73 [degrees] C.
Composition Value Neutral 10% Double-bonded acids type abielic 53% Dihydro-acids (types abietic and pimaric) 13% Tetrahydro-acids (containing pimaric type acids) 16% Dehydroabietic acids 2% Bicarbonate-soluble (oxidized acids) 6% Property Value Softening point 73 [degree] C Color (Warner) 8 Acid equivalent (g NaOH) 186 TABLE 2.
And the rosin resins are mainly composed of a mixture of C20 such as tricyclic fused-ring namely pimaric
and abietic acids.
Rosin is mainly composed of five resin acids: abietic acid, neoabietic acid, palustric acid, pimaric
acid, and isopimaric acid (Fig.