New Quinolizidine Alkaloids from Lupinus argenteus and Its Hosted Root Parasite Castilleja sulphurea. Stereochemistry and Conformation of Some Naturally Occurring Carbinolamides

Article abstract of DOI:10.1021/jo00291a019

At one Colorado location, Castilleja sulphurea (Scrophulariaceae) is a root parasite on Lupinus argenteus subsp. rubricaulis (Fabaceae).The new carbinolamide quinolizidine alkaloids 2(S),9(R)-dihydroxyaphyllidine, 1; 2(R),9(R)-dihydroxyaphyllidine, 2; 2(R