| Position | δC (J/Hz) | δH (J/Hz) | HSQC | 1H-1H COSY | HMBC | | 1 | / | 7.68 (s, 1H) | / | H-9 | / | | 2 | 158.3 | / | / | / | / | | 3 | 108.7 (t, J = 17.6 Hz) | / | / | / | / | | 4, 8 | 144.8 (dd, J = 251.4 Hz;17.6Hz) | / | / | / | / | | 5, 7 | 140.7 (dd, J = 265.7 Hz;15.4Hz) | / | / | / | H-15 | | 6 | 140.2 (t, J = 11.0 Hz) | / | / | / | / | | 9 | 42.8 | 4.92 (s, 2H) | / | H-1 | / | | 10 | 155.8 | / | / | / | H-9, H-12, H-14 | | 11 | 130.6 | / | / | / | H-9, H-12 | | 12 | 134.3 (q, J = 1.8 Hz) | 7.98 (s, 1H) | + | H-14 | H-14 | | 13 | 127.0 (q, J = 33.8 Hz) | / | / | / | H12, H-14 | | 14 | 143.4 (q, J = 1.6 Hz) | 8.72 (s, 1H) | + | H-12 | H-12 | | 15 | 62.1 | 4.14 (s, 3H) | + | H-15 | / | | 16 | 122.4 (q, J = 272.9 Hz) | / | / | / | H-12 |
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