Alkaloids from Pandanus amaryllifolius Collected from Marikina, Philippines
Daisy C. Lopez1,2*, Maribel G. Nonato2*, Hiromitsu Takayama3,
Tomotake Ichikawa3, Mariko Kitajima3, and Norio Aimi3
1Philippine Textile Research Institute, Department of Science and Technology
Bicutan, Taguig, Metro Manila, Philippines
2Graduate School and Research Center for the Natural Sciences
University of Santo Tomas, España, Manila 1008, Philippines
3Graduate School of Pharmaceutical Sciences, Chiba University
1-33 Yayoi, Inage-ku, Chiba 263-8522, Japan
corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.
The dichloromethane extract from a neutral partition of the alcoholic extract of air-dried mature leaves of Pandanus amaryllifolius from Marikina, Philippines yielded Pandamarilactone-1 (2), Pandamarilactam-3x, -3y (5-6), Pandamarilactonine-A, -B, -C (7-9), and 6Z-Pandanamine (13). The isolation of these alkaloids by this study corroborated the results from other countries despite the differences in the sites and years of leaves collection and in the extraction and partitioning conditions, which strongly suggests that these alkaloids are natural products of P. amaryllifolius and are not experimental artifacts.
INTRODUCTION
Pandanus amaryllifolius Roxb. (syn. P. odorus Ridl.) is one of the more than 600 Pandanus species that are widely distributed in the tropical and subtropical areas (Stone 1978, 1983). Many ethnomedical reports and pharmacological . . . .
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