Pyrrolizidine alkaloids of Liatris punctata and its root parasite, Castilleja integra Mead, Elliott W. ; Looker, Michael ; Gardner, Dale R. ; Stermitz, Frank R. Abstract Publication: Phytochemistry Pub Date: September 1992 DOI: 10.1016/0031-9422(92)83487-J Bibcode: 1992PChem..31.3255M