/. Etoac and . Hexane, 1 H NMR (500 MHz, CDCl 3 ): ? 7, pp.34-41

1. Hzdd and J. =. , 1, 1.9 Hz), 6.28 (s, 1H), 4.05 (s, 1H 13 C NMR (101 MHz, CDCl 3 ): ? 157, 3H), 3.76-3.60 (m, 6H), 2.80-2.66 (m, 2H) HRMS (ESI+): m/z (M + +H), pp.8-15, 1022.

. Etoac, Hexane 10:90) 1 H NMR (300 MHz, CDCl 3 ): ? 7

/. Etoac and . Hexane, 1 H NMR (500 MHz, CDCl 3 ): ? 7, pp.7036-7043

/. Etoac and . Hexane, 1 H NMR (500 MHz, CDCl 3 ): ? 7, pp.37-44

2. Hzd, J. =. 3h, and J. =. , Hz) 13 C NMR (125 MHz, CDCl 3 ): ? 171, 4H), 2.36 (s, 3H), 2.32 (br, 4H), 2.17 (t, 2H, J = 7.2 Hz) HRMS (ESI+): m/z (M + +Na, pp.65-69, 1024.

. Colourless-oil, 40 (EtOAc/Hexane 30:70). 1 H NMR (500 MHz, CDCl 3 ): ? 7, p.29

J. =-8d, 2. , and J. =. , 63 (s, 1H), 4.08 (s, 1H), 3.83 (s, 3H), 3.76 (s, 3H), 3.73-328 (m, 4H) 2.24-2.12 (m, 2H), 1.54-1.44 (m, 2H), 1.38-1.31 (m, 2H), 0.90 (t, 3H, J = 6.8 Hz) 13 C NMR (125 MHz, CDCl 3 ): ? 172, HRMS (ESI+): m/z (M + +H), pp.9035-9037, 1031.

2. Colourless-oil and J. =. , 41 (s, 1H), 4.16 (s, 1H), 3.82 (s, 3H), 3.73-3.68 (m, 4H), 3.60 (s, 2H), 3.59 (s, 3H) 13 C NMR (125 MHz, CDCl 3 ): ? 171, ). 1 H NMR (500 MHz HRMS (ESI+): m/z (M + +Na, pp.7041-7043, 1028.

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