?url_ver=Z39.88-2004&rft_id=MTMT%3A31722+10.1080%2F10575639408043927&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=+de+Kimpe+Norbert&rft.aulast=de+Kimpe&rft.aufirst=Norbert&rft.issue=1&rft.title=NATURAL+PRODUCT+LETTERS&rft.volume=5&rft.issn=1057-5634&rft.atitle=Synthesis+of+pantonine&rft.date=1994&rft.pages=1-6&rft.genre=article