%0 Journal Article %T Biosynthetic origin of the isoprene units in chromenes of Piper aduncum (Piperaceae) %A Leite %A Ana C. %A Lopes %A Adriana A. %A Kato %A Massuo J. %A Bolzani %A Vanderlan da S. %A Furlan %A Maysa %J Journal of the Brazilian Chemical Society %D 2007 %I Sociedade Brasileira de Qu¨Şmica, SBQ %R 10.1590/S0103-50532007000800008 %X metabolic studies involving the incorporation of [1-13c]-d-glucose into intact leaves of piper aduncum (piperaceae) have indicated that both the mevalonate (mva) and the pyruvate-triose (mep) non-mevalonate pathways are implicated in the biosynthesis of isoprene moieties present in methyl 2,2-dimethyl-2h-1-chromene-6-carboxylate (1) and methyl 2,2-dimethyl-8-(3'-methyl-2'-butenyl)-2h-1-chromene-6-carboxylate (2). the pattern of incorporation of label from [1-13c]-d-glucose into these chromenes was determined by quantitative 13c nmr spectroscopy. the results confirmed that biosynthetic compartment of 1 and 2 could either be the plastid and/or the cytosol or, possibly, an additional compartment such as the plastid inter-membrane space. %K piper aduncum %K chromenes %K [1-13c]-d-glucose %K mevalonate pathway %K 2-c-methyl-d-erythritol-4-phosphate pathway. %U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0103-50532007000800008&lng=en&nrm=iso&tlng=en