?url_ver=Z39.88-2004&rft_id=1760878&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=+Sulyok+Edv%C3%A1rd+Istv%C3%A1n&rft.aulast=Sulyok&rft.aufirst=Edv%C3%A1rd+Istv%C3%A1n&rft.title=Tetrahedron&rft.issue=38&rft.date=2011&rft.issn=0040-4020&rft.pages=7289-7293&rft.volume=67&rft.atitle=New+premyrsinane-type+diterpene+polyesters+from+Euphorbia+falcata&rft.genre=article