title: Mammeigin.
abstract: Single crystals of the phenylcoumarin named mammeigin (or mammea A/AA cycle D) [systematic name: 5-hydroxy-8,8-dimethyl-6-(3-methylbutanoyl)-4-phenyl-2H,8H-pyrano[2,3-f]chromen-2-one], C25H24O5, were obtained in the course of a chemotaxonomic study of the Guttiferae family. Mammeigin was extracted from the fruits of Kilmeyera pumila. The structure reveals an infinite three-dimensional network stabilized by non-classical intermolecular hydrogen bonds.
authors.affiliation: Departamento de Ciêcias Exatas, Universidade Federal de Alfenas--UNIFAL-MG, Rua Gabriel Monteiro da Silva 714, CEP 37130-000, Alfenas, MG, Brazil. doriguetto@unifal-mg.edu.br
authors.forename: Antônio C
authors.initials: AC
authors.lastname: Doriguetto
authors.forename: Javier
authors.initials: J
authors.lastname: Ellena
authors.forename: Marcelo H
authors.initials: MH
authors.lastname: Dos Santos
authors.forename: Maria E C
authors.initials: ME
authors.lastname: Moreira
authors.forename: Tanus J
authors.initials: TJ
authors.lastname: Nagem
mesh_terms: D002839:Chromans / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D008958:Models, Molecular; D015394:Molecular Structure; D009930:Organic Chemicals / Q000737:chemistry*; D011714:Pyrans / Q000737:chemistry*
chemical_list: C520180:(5-hydroxy-8,8-dimethyl-6-(3-methylbutanoyl)-4-phenyl-2H,8H-pyrano(2,3-f)chromen-2-one); D002839:Chromans; D009930:Organic Chemicals; D011714:Pyrans