The 1H(Table 1; Figures S 2 and S 9, Supporting Information and 13 C (Table 1; Figures S3 and S10, Supporting Information)
NMR spectra allowed the identification of five anomeric signals betweenδH4.70 and 6.31 corresponding to the carbon signals at δC98.0106 ppm. Four doublet signals were observed between δH1.4 and 1.7 (J= 6.0Hz), which confirmed the presence of four methylpentose units in both compounds 1and 2