Quantitative Determination of Noncondensed and Condensed Guaiacyl Nuclei in Softwood Protolignins

4 Quantitative Determination of Noncondensed and Condensed Guaiacyl Nuclei in Softwood Protolignins 

For softwood protolignins, the yields of the NE products (NEPg, guaiacol + catechol) represents the amount of noncondensed guaiacyl nuclei. 

Since the numbers of syringyl and p-coumaryl units are usually insignificant for most of the common normal softwood species, then  

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