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(300 MHz, CDCl3) d: 9.64 (br s, 1H), 7.75–7.64 (m, 6H), 7.56 (d, J = 8.1 Hz, 1H),
7.50–7.35 (m, 10H), 6.30 (s, 1H), 5.64 (d, J = 8.1 Hz, 1H), 5.02 (s, 1H), 4.92 (s,
1H), 4.30 (s, 1H), 4.03 (d, J = 11.3 Hz, 1H), 3.96 (d, J = 11.3 Hz, 1H), 3.70 (s, 1H),
3.50 (s, 1H), 2.49 (d, J = 17.1 Hz, 1H), 2.31 (d, J = 17.3 Hz, 1H), 1.08 (s, 9H).
Compound 20 1H NMR (300 MHz, CDCl3) d: 9.32–9.22 (br s, 1H), 7.69 (m, 4H),
7.50–7.36 (m, 6H), 5.91 (s, 1H), 5.62 (d, J = 8.1 Hz, 1H), 5.09 (s, 2H), 4.41 (d,
J = 4.0 Hz, 1H), 3.99 (d, J = 11.9 Hz, 2H), 3.94 (d, J = 11.5 Hz, 1H), 3.45 (s, 1H),
2.67 (d, J = 16.4 Hz, 1H), 2.39 (d, J = 4.0 Hz, 1H), 2.26 (d, J = 16.2 Hz, 1H), 1.09 (s,
9H). Compound 21 1H NMR (300 MHz, MeOD) d: 7.76 (d, J = 8.1 Hz, 1H), 5.84 (d,
J = 2.8 Hz, 1H), 5.58 (d, J = 8.1 Hz, 1H), 4.98 (m, 2H), 4.31 (s, 1H), 3.81–3.76 (m,
2H), 3.3 (s, 1H), 2.61–2.47 (m, 1H), 2.43–2.29 (m, 1H). Compound 22 1H NMR
(300 MHz, CDCl3) d: 9.32 (br s, 1H), 7.57 (d, J = 8.1 Hz, 1H), 7.39–7.25 (m, 9H),
6.91–6.81 (m, 4H), 6.00 (d, J = 2.6 Hz, 1H), 5.68 (d, J = 8.1 Hz, 1H), 5.12 (s, 2H),
4.46 (s, 1H), 3.81 (s, 6H), 3.49 (d, J = 10.6 Hz, 1H), 3.46 (s, 1H), 3.42 (d,
J = 10.6 Hz, 1H), 2.70 (d, J = 17.1 Hz, 1H), 2.41 (d, J = 16.6 Hz, 1H). Compound 23
31P, NMR (121 MHz, CDCl3) d: 149.2, 148.9.
p
11. Kumar, S.; Hansen, M. H.; Albà k, N.; Steffansen, S. I.; Petersen, M.; Nielsen, P. J.
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