The absorption spectra of the color resulting from the action of resorcinol on spruce “native” lignin in acid solution was found to have a maximum at identical wave length to that of the color resulting from the acidification of catalytically reduced 4', 7-dihydroxy-3'- methoxyflavanone. This is also identical to the maxima obtained by reduction of 2', 4, 4 '- trihydroxy-3-methoxychal-cone with lithium aluminum hydride or by the condensation of ...
