title: Braunicetals: acetals from condensation of macrocyclic aldehydes and terpene diols in Botryococcus braunii.
abstract: Two series of braunicetals were isolated from the green microalga Botryococcus braunii. Based on spectroscopic and chemical evidence, their structures were determined to be acetals formed by the condensation of C32 and C34 macrocyclic aldehydes with C33 and C34 methylated squalene diols (series I), or a C40 lycopaene diol (series II).
authors.affiliation: Laboratoire de Chimie Bioorganique et Organique Physique, Bioemco, UMR CNRS 7618, Ecole Nationale Supérieure de Chimie de Paris, 11 Rue Pierre et Marie Curie, 75231 Paris Cedex 05, France. pierre-metzger@enscp.fr
authors.forename: Pierre
authors.initials: P
authors.lastname: Metzger
authors.forename: Marie-Noëlle
authors.initials: MN
authors.lastname: Rager
authors.forename: Céline
authors.initials: C
authors.lastname: Fosse
mesh_terms: D000080:Acetals / Q000737:chemistry* / Q000302:isolation & purification; D000447:Aldehydes / Q000737:chemistry* / Q000302:isolation & purification; D000460:Chlorophyta / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D008968:Molecular Conformation; D013185:Squalene / Q000737:chemistry / Q000302:isolation & purification; D013729:Terpenes / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D000080:Acetals; D000447:Aldehydes; D013729:Terpenes; D013185:Squalene