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1H NMR spectrum (500 MHz, δ ppm, CDCl3): 2.32—2.54 (m, methylene, 8H), 3.44 (q, methine, 2H). 13C NMR spectrum (75.4 MHz, δ ppm, CDCl3): 35.0, 37.9, 38.2, 43.9, 175.5.
1H NMR spectrum (500 MHZ, δ ppm, DMSO-d6): 2.20 (broad, methylene, 4H), 2.33 (broad, methylene, 4H), 2.81 (m, methine, 2H), 2.94 (s, N(CH3)2, 6H), 6.74 (broad, phenylene-H, 2H, J=8.7 Hz), 7.03 (d, trans-vinylene-H, 1H, J=15.9 Hz), 7.20 (d, trans-vinylene-H, 1H, J=15.9 Hz), 7.48 (broad, phenylene-H, 2H, J=8.7 Hz), 8.01 (broad, trisubstituted phenylene-H, 1H), 8.18 (broad, trisubstituted phenylene-H, 1H), 9.66 (broad, amide, 1H) 10.05 (broad, amide, 1H). 13C NMR spectrum (75.4 MHz, δ ppm, DMSO-d8): 34.27, 35.86, 36.00, 36.15, 36.88, 37.33, 37.60, 112.40, 116.86, 120.95, 122.27, 124.44, 128.91, 129.13, 131.35, 134.50, 137.92, 139.56, 151.10, 173.41, 174.02.
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Tang, H., Baba, M., Imae, I. et al. Synthesis and Optical Activity of Polyamides Derived from Optically Active Spiro[3.3]heptane-2,6-dicarboxylic Acid. Polym J 31, 313–315 (1999). https://doi.org/10.1295/polymj.31.313
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DOI: https://doi.org/10.1295/polymj.31.313