Table 2: 1H-NMR (CDCl3, 400 MHz), 13C-NMR, and DEPT-135 (100 MHz) spectral data of compound 1.

Position1H NMR13C NMRDEPT-135[10]
1H NMR13C NMR

CHO9.94, s195.4195.49.90, s196
2(−OH)11.68, s157.9156.3
NH8.19, s
8a140.28.25, s142.3
9a145.1144.8
3115.5114.7
48.05, s125.9125.9124.3
57.95 (1H, d, J = 7.75, 2.1 Hz)119.8119.88.00, d120.5
4b125.3116.3
67.41, s123.7123.7108.5
77.43 (1H, dd, J = 7.75, 2.1 Hz)120.9120.9158.5
87.99 (1H, dd, J = 8, 2.1 Hz)110.9110.995.6
4a117.4117.0
1109.1108.9
1′3.66, (1H, d, J = 6.90 Hz)22.922.93.65, d, J = 7 Hz22.6
2′5.35, 1H (t)121.3121.35.35, t, J = 6 Hz121.6
3′134.2131.7
4′1.91, s25.725.81.66, s25.7
5′1.80, s18.218.21.82, s17.9