Isolation and Structure Elucidation of Two New Alkaloids, Pandamarilactonine-C and -D, from Pandanus amaryllifolius and Revision of Relative Stereochemistry of Pandamarilactonine-A and -B by Total Synthesis.

Two new pyrrolidine alkaloids, pandamarilactonine-C and -D, were isolated from Pandanus amaryllifolius. Based on the total synthesis of pandamarilactonine-C and its related alkaloid, pandamarilactonine-A, the relative stereochemistry of pandamarilactonine-A and -B, which was previously proposed by spectroscopic analysis, was revised.