ISSN 0269-3879 Comparative study on enantiomeric excess of main akannin/shikonin derivatives isolated from the roots of three endemic Boraginaceae plants in China (pages 1067–1075) Wen Zhou, Hu Da Gu La Jiang, Ying Peng and Shao Shun Li Article first published online: 10 FEB 2011 | DOI: 10.1002/bmc.1570 Development and validation of a reliable high-performance liquid chromatographic method for d..