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1. Hz, 77 (s, 1H, H1); 13 C NMR (75 MHz, CDCl3): ?(ppm): 52, OCH3, vol.9, p.66

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, 32 (dd, J1 = 9 Hz, J2 = 2.4 Hz, pp.67-74

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, 28 (d, J = 8.7 Hz, 1H)40 (s, 1H, H5)43 (s, 1H, H1), C NMR (75 MHz, CDCl3): ?(ppm), pp.12-20

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, 16 (d, J = 8.7 Hz, 1H)21 (s, 1H, H5)47 (s, 1H, H1), J2 = 2.4 Hz, 1H)02-9.05 (m, 1H, H12); 13 C NMR (75 MHz, CDCl3): ?(ppm): 55.60 (OCH3), p.6742

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