Chemical behavior of methylpyranomalvidin-3-o-glucoside in aqueous solution studied by NMR and UV-visible spectroscopy - Oliveira, J.; Petrov, V.; Parola, A.J.; Pina, F.; Azevedo, J.; Teixeira, N.; Brás, N.F.; Fernandes, P.A.; Mateus, N.; Ramos, M.J.; de Freitas, V. (Journal of Physical Chemistry B, 2011)