[Retracted] Endophytic Fungi and Secondary Metabolites of Rehmannia Glutinosa Based on Traditional Chinese Medicine Fingerprints

Figure 6

Compound 4. ¹H NMR (600 MHz, CDCl₃) gives 10 hydrogen signals, including 5 aromatic hydrogen signals [δ: 7.29 (1H, d, J = 8.71 Hz, H-3), 7.03 (1H, d, J = 8.70 Hz, H-4), 7.29 (1H, d, J = 8.41 Hz, H-5), 7,58 (1H, t, J = 8.42 Hz, H-6), 7.29 (1H, d, J = 8.41 Hz, H-7)], 2 active hydrogen signals [δ: 7.29 (1H, s, OH), 11.76 (1H, s, OH)], and 1 methoxy signal [δ: 3.93(3H, s, H–2OCH₃)].