Figure 5.

Expanded region of the superimposed 2D ¹H-¹³C HSQC-TOCSY NMR spectra of N. variegata (black signals), β-sitosterol (red signals), phytol (green signals) and α-tocopherol (blue signals). Selected crosspeaks are assigned. Complete assignments are presented in Tables S1–S3. Notice that the characteristic signal patterns of the pure standard compounds matches the corresponding signals of the same compounds present as part of mixture comprising the extract of N. variegata.