“…13 C NMR (100 MHz, CDCl 3 ) δ 171.0 (C-28), 150.9 (C-20), 109.4(C-30), 80.9 (C-3), 55.4 (C-17), 50.4 (C-18), 48.3 (C-5), 48.0 (C-9), 42.9 (C-19), 40.9 (C-4), 40.0 (C-8), 38.4 (C-13), 38.1 (C-1), 37.8 (C-22), 37.1 (C-10), 35.6 (C-7), 34.2 (C-14), 29.9 (C-12), 27.9 (C-12), 27.4 (C-2), 25.1 (C-15), 23.7 (C-16), 21.3 (C-23), 20.9 (C-24), 19.3 (C-29), 18.2 (C-11), 16.5 (C-25), 16.19 (C-6), 15.9 (C-26), 14.5 (C-27). This was in accordance with the data reported in the literature (de Freitas et al 2015).…”