Urushiol 8 -monoene

Fig (3)-2, Urushiol (8Z)-monoene and Fig (3)-3, (8Z,llZ)-diene were synthesised in a comparable synthon sequences from 2,3-dimethoxybenzaldehyde [226,227]... 

In addition, especially in the processed urushi samples, peaks with masses [M]K" =665 daltons and [M]K" =667 daltons which are the expected products of the dimerization reaction by oxidation of the phenol part of the catechol derivatives of urushiol. Supercritical fluid chromatography in combination with electron bombardment mass spectrometry was then used for the identification of some of the major components of the urushiol samples. Most prominently were found the trienes with [M]=314 daltons, and [M]=317 daltons and the monoenes. Again the compound with the mass of [M]=332 daltons was noticed which was the water adduct of the triene [M]=314 daltons. 

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