@MASTERSTHESIS{ 1994:1155296673,
 	title = {Isolamento e determina??o estrutural de metab?litos secund?rios de Pinus strobus var. chiapensis (Martinez)},
 	year = {1994},
 	url = "https://tede.ufrrj.br/jspui/handle/jspui/4174",
 	abstract = "Com objetivo de correlacionar a qu?mica dos metab?litos secund?rios da madeira
 de pinheiros tropicais com a susceptibilidade ao ataque da "vespa-da-madeira" (Sirex
 noctilio - Sericidae), exemplares de pinus cultivados no Brasil foram fornecidos pela equipe
 t?cnica da DURAFLORA S/A (Agudos - SP.) para serem estudadas.
 O extrato hex?nico e clorof?rmico de Pinus strobus var. chiapensis (Martinez) foi
 submetido a fracionamento cromatogr?fico e cristaliza??o das fra??es e forneceram
 sitosterol, 3-0-acilsitosterol, lariciresinol, quatro flavon?ides [4-hidroxi-7-metoxi-flavanona
 (pinostrobina), 6-metil-pinostrobina, 4-hidroxi-7-metoxi-flavona (tectocrisina), 6-metiltectocrisina], quatro trans-estilbenos [3-metoxi-5-hidroxi-7,8 diidro estilbeno (?ter metildiidro-pinossilvina), 3,5-dimetoxi-7,8-dihidro estilbeno (?ter dimetil diidro pinossilvina), 3-
 metoxi-5-hidroxi-estilbeno (eter metil pinossilvina) e 3,5-dimetoxi estilbeno (?ter dimetil
 pinosilvina), e dois diterpenos (?cido isopim?rico e ?cido diidroabi?tico)
 As estruturas das subst?ncias foram determinados atrav?s de an?lise dos dados de
 IV, RMN 1D (1H, 13C, DEPT e NOE-DS) e 2D [1H x 1H - COSY, 1H x 13C - COSY
 (1JCH - Heterocosy e nJCH, n = 1, 2 e 3 - COLOC)] e E.M. das subst?ncias naturais e
 derivados.
 ABSTRACT
 The correlation of the secundary metabolites from the tropical Pinus species by
 Sirex noctilio (Sericidae) "wood's wasp" motivated to investigat the substances from Pinus
 strobus var chiapensis that was supplied by technicians from DURAFLORA S/A (Agudos -
 SP - Brazil).
 The hexanic extract of the wood of P. strobus var. chiapensis (Martinez) after
 chromatographic fractionation and recrystallisation afforded sitosterol, 3-O-acylsitosterol,
 lariciresinol, four flavonoids [4-hydroxy-7-methoxy-flavanone (pinostrobin), 6-methylpinostrobin, 4-hydroxy-7-methoxy-flavone (tectochysin) and 6-methyl-tectochrysin], four
 stilbene [3-methoxy-5-hydroxystilbene (pino sylvin-monomethylether), 3-methoxy-5-
 hydroxystilbene (dihydropinosylvin-monomethylether), 3,5 -dimethoxy-dihydro stilbene
 (dihydropinosylvin-dimethylether) and 3,5-dimethoxy-stilbene (pinosylvin dimethylether)]
 and two diterpenes (isopimaric acid and dehydroabietic acid).
 The structures were determined based on IR, NMR and MS spectral data includin
 two dimensional tecniques and NOE experiments of the natural compounds as well as of the
 acetylated and methylated derivatives.
 xi",
 	publisher = {Universidade Federal Rural do Rio de Janeiro},
 	scholl = {Programa de P?s-Gradua??o em Qu?mica},
 	note = {Instituto de Ci?ncias Exatas}
}