The structure of ?-diketones related to curcumin determined by X-ray crystallography, NMR (solution and solid state) and theoretical calculations - Nieto, C.I.; Cabildo, P.; Claramunt, R.M.; Cornago, P.; Sanz, D.; Torralba, M.C.; Torres, M.R.; Ferraro, M.B.; Alkorta, I.; Marín-Luna, M.; Elguero, J. (Structural Chemistry, 2016)