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We have studied and characterized the structure of hydrolysable tannins of commercial powder tara, performed by means ultra-high-resolution mass spectrometry (MALDI/FT-ICR) without using separation techniques. Our experimental results, supported by computational calculations at DFT/ M05-2X level of theory, show that the identified species are basically oligomeric structures of polygalloyquinic acids, of the (C7H4O4)n(C7H12O6) type, composed by a chain of polygallic esters (depside) linked, via ester bond, to one quinic acid. a Instituto de Química-Física “Rocasolano”, CSIC, Serrano 119, 28006, Madrid, España. jdavalos@iqfr.csic.es b Facultad de Ingeniería Industrial y de Sistemas, Universidad Nacional Federico Villarreal, Av. Colonial 450, Lima 01, Perú. c Facultad de Ing. Química, Universidad Nacional de Ingeniería, Av. Túpac Amaru s/n, Lima 01, Perú. d Facultad de Ciencias, Universidad Nacional de Ingeniería, Av. Túpac Amaru s/n, Lima 01, Perú. Caracterización, mediante espectrometría de masas de alta resolución MALDI/FT-ICR... 107 Rev Soc Quím Perú. 83(1) 2017

CARACTERIZACIÓN, MEDIANTE ESPECTROMETRÍA DE MASAS DE ALTA RESOLUCIÓN MALDI/FT-ICR, DE TANINOS HIDROLIZABLES DE LA TARA