title: Novel bifunctional chiral urea and thiourea derivatives as organocatalysts: enantioselective nitro-Michael reaction of malonates and diketones.
authors.affiliation: Centro de Innovación en Química y Materiales Avanzados (CINQUIMA), Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Valladolid, Valladolid, Spain.
authors.forename: José M
authors.initials: JM
authors.lastname: Andrés
authors.forename: Rubén
authors.initials: R
authors.lastname: Manzano
authors.forename: Rafael
authors.initials: R
authors.lastname: Pedrosa