Kim, N C <br/><br/>
Isolation of symlandine from the roots of common comfrey (Symphytum officinale) using countercurrent chromatography.  [electronic resource] 

 -  Journal of natural products  Feb 2001 
 - 251-3 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, U.S. Gov't, P.H.S. 
<br/><br/><label>ISSN: </label>0163-3864 
<br/><br/><label>Standard No.: </label>10.1021/np0004653  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Countercurrent Distribution<br/>Magnetic Resonance Spectroscopy<br/>Magnoliopsida--chemistry<br/>Models, Chemical<br/>Plant Roots--chemistry<br/>Pyrrolizidine Alkaloids--chemistry