1. Wiedendiol-A and -B, cholesteryl ester transfer protein inhibitors from the marine sponge Xestospongia wiedenmayeri
2. Plasma cholesteryl ester transfer protein
3. Enantiospecific synthesis of (+)-puupehenone from (−)-sclareol and protocatechualdehyde
4. Representative physical data are given below: 8 1H RMN (CDCl3, 400 MHz) δ 9.86 (d, J= 1.7 Hz, 1H), 2.37 (m, 1H), 1.94 (m, 1H), 1.16 (s, 3H), 1.02 (d, J= 7.4 Hz, 3H), 0.85 (s, 3H), 0.83 (s, 3H). 13C RMN (CDCl3, 100 MHz) : δ 39.7 (C1), 17.3 (C2), 42.0 (C3), 33.2 (C4), 55.7 (C5), 18.1 (C6), 34.2 (C7), 29.9 (C8), 65.6 (C9), 37.1 (C10), 33.5 (C11), 21.6 (C12), 18.0 (C13 or C14), 17.2 (C14 or C13), 206.7 (C15). 10 1H RMN (CDCl3, 300 MHz) δ 9.72 (dd, J= 3.3, 1.6 Hz, 1H), 2.50 (ddd, J= 15.9, 4.6, 1.6 Hz, 1H), 2.30 (ddd, J= 15.9, 8.9, 3.3 Hz, 1H), 1.90 (dt, J= 8.9, 4.6 Hz, 1H), 0.94 (d, J= 7.5 Hz, 3H), 0.88 (s, 3H), 0.86 (s, 3H), 0.82 (s, 3H). 13C RMN (CDCl3, 75 MHz) : δ 39.9 (C1), 17.5 (C2), 42.7 (C3), 33.5 (C4), 56.6 (C5), 18.4 (C6), 34.6 (C7), 32.6 (C8), 48.2 (C9), 39.4 (C10), 33.4 (C11), 21.6 (C12), 16.6 (C13 or C14), 15.8 (C14 or C13), 39.8 (C15), 203.7 (C16). 11 1H RMN (CDCl3, 300 MHz) δ 6.83 (dd, J= 17.2, 10.7 Hz, 1H), 5.37 (t, J= 7.4 Hz, 1H), 5.19 (d, J= 17.2 Hz, 1H), 5.08 (d, J= 10.7 Hz, 1H), 1.82 (sa, 3H), 0.91 (d, J= 7.8 Hz, 3H), 0.89 (s, 3H), 0.86 (s, 3H), 0.83 (s, 3H). 14 1H RMN (CDCl3, 300 MHz) δ 7.38–7.47 (m, 20H), 6.88 (d, J= 8.9 Hz, 1H), 6.87 (d, J= 8.9 Hz, 1H), 6.59 (d, J= 8.9 Hz, 2H), 5.37–4.97 (m, 10H), 3.86 (s, 3H), 3.85 (s, 3H), 3.40 (da, J= 10.7 Hz, 1H), 2.90 (da, J= 11.1 Hz, 1H), 2.28 (m, 1H), 2.08 (m, 1H), 1.90 (m, 1H), 1.79 (m, 1H), 1.18 (d, J= 7.3 Hz, 3H), 1.13 (s, 3H), 1.03 (s, 3H), 0.90 (s, 3H), 0.87 (s, 3H), 0.83 (s, 3H), 0.82 (s, 3H), 0.69 (d, J= 7.2 Hz, 3H). 15 1H RMN (CDCl3, 400 MHz) δ 7.28–7.45 (m, 10H), 6.83 (d, J= 8.9 Hz, 1H), 6.55 (d, J= 8.9 Hz, 1H), 5.89 (s, 1H), 5.08 (s, 2H), 4.95 (d, J= 10.6 Hz, 1H), 4.90 (d, J= 10.6 Hz, 1H), 3.72 (s, 3H), 2.66 (m, 1H), 1.84 (d, J= 11.9 Hz, 1H), 1.70 (dt, J= 13.7, 3.5 Hz, 1H), 1.20 (s, 3H), 1.05 (d, J= 7.5 Hz, 3H), 0.89 (s, 3H), 0.86 (s, 3H). 13C RMN (CDCl3, 100 MHz) : δ 38.7 (C1), 19.0 (C2), 42.3 (C3), 34.0 (C4), 54.6 (C5), 17.9 (C6), 33.9 (C7), 32.3 (C8), 158.0 (C9), 40.9 (C10), 33.5 (C11), 22.5 (C12), 21.5 (C13 or C14), 21.9 (C14 or C13), 113.1 (C15), 124.5 (C1′), 146.5 (C2′ or C3′), 147.4 (C3′ or C2′), 110.9 (C4′), 106.1 (C5′), 152.2 (C6′). 16 1H RMN (CDCl3, 300 MHz) δ 7.31–7.44 (m, 10H), 6.86 (d, J= 8.8 Hz, 1H), 6.56 (d, J= 2.9 Hz, 1H), 6.37 (dd, J= 8.8, 2.9 Hz, 1H), 5.13 (s, 2H), 5.08 (s, 2H), 3.72 (s, 3H).