Patent ID: 7626043

Claim:
An isolated compound having, the following formula: or a salt thereof, wherein the compound has the following spectral data: 13 C NMR (d4-methanol, 150 MHz): 173.9(C), 173.6(C), 160.0(C), 138.0(CH), 137.7(C), 133.4(C), 131.47(CH), 131.1(CH), 130.8(CH), 130.2(CH), 126.4(CH broad), 126.4(CH broad), 125.8(CH), 85.6(CH), 84.4(CH), 80.3(CH broad), 72.7(C), 69.7(CH broad), 49.4(CH (hidden)), 44.6(CH), 43.2(CH2), 40.8(CH broad), 39.4(CH2), 35.7(CH), 34.6(CH2), 27.9(CH2), 23.0(CH2), 16.9(CH3), 16.9(CH3), 12.9(CH3), 11.9(CH3), 11.5(CH3), 11.5(CH3), 9.4(CH3); 1 H NMR(d4-methanol, 600 MHz): 6.58(dd 11.3, 11.3), 6.36(dd 12.3. 11.7), 6.35(dd 11.0, 11.0), 6.07(d 10.3), 5.84(bd 13.7), 5.81(ddd 15.2, 8.1, 6.2), 5.51(dd 10.3, 10.3), 5.28(dd 10.3, 10.3), 5.1(dd 6.9, 6.9), 5.05(d 10.3), 4.01(ddd 10.3, 7.6, 2.8), 3.31(bm), 3.03(bm), 2.72(d 17.2), 2.43(dd 14.5, 3), 2.42(bs), 2.33(m), 2.31(d 17.2), 2.22(m), 2.19(dd 14.5, 11.7), 2.03(m), 1.85(dq 9.6, 7.6), 1.84(m), 1.78(s), 1.72(bq 6.8), 1.61(ddt 14.4, 6.8, 6.8), 1.44(bs), 1.1(d 6.5), 1.08(d 7.2), 1.02(d 6.9), 1.00(t 7.4), 0.86(d 6.7).