T. Akiyama et al., Proof of the presence of racemic forms of arylglycerol-beta-aryl ether structure in lignin: studies on the stereo structure of lignin by ozonation, J WOOD SCI, 46(5), 2000, pp. 414-415
Recent rapid progress of the biosynthetic study of lignan, especially findi
ng a new type of protein that regulates the stereo structure of lignan,(1)
seems to "re-create" an interest in the investigation of optical activity o
f lignin, although lignin has long been assumed to be optically inactive.