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Ent-labdane derivatives from gutierrezia grandis
Authors:Feng Gao  Mark Leidig  Tom J. Mabry
Affiliation:Department of Botany, University of Texas at Austin, Austin, TX 78713, U.S.A.
Abstract:Two new diterpenes, 3α-angeloyloxy-18-hydroxy-13-furyl-ent-labda-8(17)-ene and 3α-hydroxy-18-angeloyloxy- 13-furyl-ent-labda-8(17)-ene and an only recently reported third diterpene, 3α, 18-dihydroxy-13-furyl-ent-labda-8(17)-ene, were isolated from the leaves of Gutierrezia grandis. Their structures were determined by mass spectral, IR, 1H NMR and 13C NMR data was well as chemical evidence.
Keywords:Compositae  Astereae
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