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Alcalde Eon, Cristina Saavedra, Gloria Pascual-Teresa, Sonia de Rivas Gonzalo, Julián C. 2024-02-05T08:41:17Z 2024-02-05T08:41:17Z 2004-10 Cristina Alcalde-Eon, Gloria Saavedra, Sonia de Pascual-Teresa, Julián C. Rivas-Gonzalo, Identification of anthocyanins of pinta boca (Solanum stenotomum) tubers, Food Chemistry, Volume 86, Issue 3, 2004, Pages 441-448, ISSN 0308-8146, https://doi.org/10.1016/j.foodchem.2003.09.019. (https://www.sciencedirect.com/science/article/pii/S0308814603004849) 0308-8146 http://hdl.handle.net/10366/155283 10.1016/j.foodchem.2003.09.019 [EN]The coloured tubers of Solanum stenotomum, a native and very common crop in the Bolivian and Peruvian Altiplano, were analysed to determine their anthocyanin composition. Tubers were boiled, ground and freeze-dried, in a pre-treatment step, in order to inhibit enzymatic reactions and to obtain a stable dried powder or “concentrate”. After dissolving the tuber concentrate and the subsequent purification, the anthocyanin composition was characterised by HPLC-DAD-MS. Eleven different compounds were found, all of them acylated with hydroxycinnamic acids and most of them having the same substitution pattern, anthocyanidin 3-acylrutinoside-5-glucoside. The principal anthocyanin was petunidin 3-O-p-coumaroylrutinoside-5-O-glucoside. Other anthocyanins found were 3-O-p-coumaroylrutinoside-5-O-glucoside of peonidin, malvidin and delphinidin, 3-O-feruloylrutinoside-5-O-glucoside of petunidin, peonidin and malvidin, 3-O-caffeoylrutinoside-5-O-glucoside of petunidin and peonidin and 3-O-p-coumaroylrutinoside of petunidin. The presence of acylation in all the anthocyanins found in the sample would improve their stability against some degrading factors and makes the pinta boca tubers a potential source of more stable anthocyanins eng http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivatives 4.0 Internacional coloured potato tubers anthocyanins LC-MS Pinta Boca Solanum stenotomum Identification of anthocyanins of pinta boca (Solanum stenotomum) tubers. info:eu-repo/semantics/article