Table 3.

NMR spectroscopy data for naringenin isolated from E. magalismontanum.

NMR	Spectra Signal Correlations
1H	δ 7.37 and 6.83 ppm, (J = 8.6 Hz, H-2′, 6′ and H-3′, 5); δ 5.87 and 5.89 ppm (J = 2.2 Hz, H-6 and H-8). 5-OH δ 5.44 (1H, dd, J = 13.0 and 3.0 Hz), δ 2.70 (1H, dd, J = 17.2 and 3.0 Hz) and δ 3.15 (1H, dd, J = 17.2 and 13.0 Hz)
13C	δ 98.20 (C-6), δ 97.50 (C-8), δ 115.22 (C-3′ and C-5′) and δ 128.10 (C-2′ and C-6′)
HMBC	2JC-H and 3JC-H, δ 196.28 (C-4), δ 160.10 (C-4′), δ 166.59 (C-7), δ 164.11 (C-5), δ 163.50 (C-8a), δ 129.49 (C-1′) and δ 102.19 (C-4a).

Chemical shifts and coupling constants (J, Hz, in parentheses) (see Supplementary Materials).