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34250701859
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Compound 7: Rf, 0.75 (eluent: hexane-EtOAc, 80:20, α]D20-3.5 (c 1.0, CHCl 3, IR: 2940, 1750, 1720, 1630, 1470, 1460, 1250, 1090 cm -1. 1H NMR: δ, 4.82 (d, J, 9.9 Hz, 1 H, 4.21 (d, J, 5.5 Hz, 1 H, 3.99 (m, 1 H, 3.70-3.52 (m, 6 H, 3.50 (s, 2 H, 3.11 (s, 3 H, 2.80 (dd, J, 15.8, 5.1 Hz, 1 H, 2.72 (dd, J, 15.8, 4.8 Hz, 1 H, 2.22 (t, J, 7.0 Hz, 2 H, 1.69 (m, 1 H, 1.62 (s, 3 H, 1.42 (m, 1 H, 0.87 (d, J, 7.0 Hz, 3 H, 0.86-0.79 (3 s, 27 H, 0.68 (d, J, 6.6 Hz, 3 H, 0.08-0.02 (6 s, 18 H) ppm. 13C NMR: δ, 201.2 (s, 167.4 (s, 137.6 (s, 126.5 (d, 78.5 (d, 70.4 (d, 70.1 (d, 62.0 (t, 55.1 (q, 52.0 (q, 50.4 (t, 48.7 (t, 45.2 (d, 43.0 (t, 39.6 (d, 25.9 (3 q, 25.8 (3 q, 25.6 (3 q, 18.2 (s, 18.1 (s, 18.0 (s, 17.1 (q, 11.3 (q, 10.5 (q, 4.0 (q, 4.3 (q, 4.5 (q, 4.6 (q, 4.8 q
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13C NMR: δ = 201.2 (s), 167.4 (s), 137.6 (s), 126.5 (d), 78.5 (d), 70.4 (d), 70.1 (d), 62.0 (t), 55.1 (q), 52.0 (q), 50.4 (t), 48.7 (t), 45.2 (d), 43.0 (t), 39.6 (d), 25.9 (3 q), 25.8 (3 q), 25.6 (3 q), 18.2 (s), 18.1 (s), 18.0 (s), 17.1 (q), 11.3 (q), 10.5 (q), -4.0 (q), -4.3 (q), -4.5 (q), -4.6 (q), -4.8 (q), -5.5 (q) ppm.
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