| prov:value
| - .sup.1H-NMR (CDCl.sub.3) .delta.(ppm): 1.21 (3H, s), 2.44 (1H, d, J=14.0 Hz), 2.53-2.81 (5H, m, including 2.62, d, J=14.0 Hz) 3.40 (1H, br.s), 3.56 (4H, br.s), 4.54 (2H, s), 4.79 (2H, d, J=6.0 Hz), 6.40 (1H, td, J=6.0, 16.0 Hz), 6.66 (1H, d,
|