Structure elucidation of alkaloids from Philippine flowering plants

This work forms part of growing studies on Natural Product Chemistry in the Philippines. Alkaloid field screening conducted by the University of Santo Tomas Research Centre provided the opportunity to carry out this study on five endemic Philippine plants. Structural elucidation of the alkaloids present in three of these plants was obtained largely by physical methods, most importantly by the use of sophisticated NMR techniques which are described in detail in the text.