Four lignans, blechnic acid (1), 7-epiblechnic acid (3), 8-epiblechnic acid (6) and brainic acid (2), were isolated from six Blechnaceous ferns, Blechnum orientale, Struthiopteris amabilis, S. niponica, Woodwardia orientalis, W. prolifera and Brainea insignis. Their structures were determined by spectroscopic methods and chemical conversion.
No takes yet. Share an insight, caveat, or question.
Wada et al. (1992) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: