title: Champanones, yellow pigments from the seeds of champa (Campomanesia lineatifolia).
abstract: Chemical investigation of the methanol extract of the seeds of Campomanesia lineatifolia Ruiz and Pav. (Myrtaceae) led to the isolation of two new beta-triketone type compounds, named champanones A (1) and B (2), together with the known 2,3-dihydro-5-hydroxy-6,8,8-trimethyl-2-phenyl-4H-1-benzopyran-4,7(8H)-dione (champanone C) (3). The structures of 1 and 2 were determined to be 2,2,4,4-tetramethyl-6-(1-oxo-3-phenylprop-2-enyl) cyclohexane-1,3,5-trione (occurs as an enol form) and 2,2,4-trimethyl-6-(1-oxo-3-phenylprop-2-enyl)cyclohexane-1,3,5-trione (occurs as an enol form), respectively, by means of spectroscopic analysis. The three compounds showed mild antimicrobial activity.
authors: Departamento de Química, Universidad Nacional de Colombia, AA 14490, Bogotá, Colombia.
authors: Adriana
authors: A
authors: Bonilla
authors: Carmenza
authors: C
authors: Duque
authors: Cristina
authors: C
authors: Garzón
authors: Yoshihisa
authors: Y
authors: Takaishi
authors: Kazutaka
authors: K
authors: Yamaguchi
authors: Noriyuki
authors: N
authors: Hara
authors: Yoshinori
authors: Y
authors: Fujimoto
mesh_terms: D000890:Anti-Infective Agents / Q000737:chemistry / Q000494:pharmacology; D001578:Benzopyrans / Q000737:chemistry; D003510:Cyclohexanes / Q000737:chemistry; D007659:Ketones / Q000737:chemistry; D015394:Molecular Structure; D027822:Myrtaceae / Q000737:chemistry*; D010860:Pigments, Biological / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D012639:Seeds / Q000737:chemistry*
chemical_list: C505177:2,2,4,4-tetramethyl-6-(1-oxo-3-phenylprop-2-enyl) cyclohexane-1,3,5-trione; C505176:2,2,4-trimethyl-6-(1-oxo-3-phenylprop-2-enyl)cyclohexane-1,3,5-trione; C505175:2,3-dihydro-5-hydroxy-6,8,8-trimethyl-2-phenyl-4H-1-benzopyran-4,7(8H)-dione; D000890:Anti-Infective Agents; D001578:Benzopyrans; D003510:Cyclohexanes; D007659:Ketones; D010860:Pigments, Biological