Identification of maloyl glucans from Euphorbia tirucalli by ESI-(-)-FT-ICR MS analyses
Article
Kuster, RM, Caxito, MLC, Sabino, KCC et al. (2015). Identification of maloyl glucans from Euphorbia tirucalli by ESI-(-)-FT-ICR MS analyses
. PHYTOCHEMISTRY LETTERS, 12 209-214. 10.1016/j.phytol.2015.04.008
Kuster, RM, Caxito, MLC, Sabino, KCC et al. (2015). Identification of maloyl glucans from Euphorbia tirucalli by ESI-(-)-FT-ICR MS analyses
. PHYTOCHEMISTRY LETTERS, 12 209-214. 10.1016/j.phytol.2015.04.008
Euphorbia tirucalli aerial parts are popularly used in Brazil for cancer treatment. The elution of the aqueous extract of the plant on silica gel C-18 cartridge furnished a water-soluble fraction, which was analyzed directly into the electrospray ionization (ESI) source combined with Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) and characterized as a mixture of malic acid glycosides 1-5. The compounds were detected in their deprotonated form [M-H]-, where their exact mass (mass error lower than 1 ppm), molecular formula (CnHhOo), double bond equivalent (DBE) and connectivity were determined from ESI-(-)-MS and ESI-(-)-MS/MS experiments. The presence of malic acid and glucose, as part of the structures, could originate from crassulacean acid metabolism (CAM) of the plant
