title: Unusual chromenes from Peperomia blanda.
abstract: From the methanol extract of the aerial parts of Peperomia blanda (Piperaceae), two chromenes were isolated and characterized mainly through application of 2D-NMR spectroscopy. The structures were 2S-(4-methyl-3-pentenyl)-6-formyl-8-hydroxy-2,7-dimethyl-2H-chromene and 2S-(4-methyl-3-pentenyl)-5-hydroxy-6-formyl-2,7-dimethyl-2H-chromene named as blandachromenes I and II, respectively.
authors.affiliation: Núcleo de Pesquisas de Produtos Naturais, Universidade Federal do Rio de Janeiro, 21941-590 Rio de Janeiro, Brazil.
authors.forename: Leosvaldo S M
authors.initials: LS
authors.lastname: Velozo
authors.forename: Marcelo J P
authors.initials: MJ
authors.lastname: Ferreira
authors.forename: Maria Isabel S
authors.initials: MI
authors.lastname: Santos
authors.forename: Davyson L
authors.initials: DL
authors.lastname: Moreira
authors.forename: Vicente P
authors.initials: VP
authors.lastname: Emerenciano
authors.forename: Maria Auxiliadora C
authors.initials: MA
authors.lastname: Kaplan
mesh_terms: D001578:Benzopyrans / Q000737:chemistry* / Q000302:isolation & purification; D002942:Circular Dichroism; D009682:Magnetic Resonance Spectroscopy; D000432:Methanol / Q000737:chemistry; D036941:Peperomia / Q000737:chemistry*; D035261:Plant Components, Aerial / Q000737:chemistry; D012997:Solvents / Q000737:chemistry
chemical_list: D001578:Benzopyrans; D012997:Solvents; C510933:blandachromene I; C510934:blandachromene II; D000432:Methanol