¹H NMR (400 MHz, CDCl₃) δ 9.09 (d, J = 8.8 Hz, 1H), 8.39 (d, J = 8.5 Hz, 1H), 8.23 (s, 1H), 8.07 (d, J = 8.8 Hz, 1H), 7.98 (d, J = 8.1 Hz, 1H), 7.83 (dd, J = 19.7, 7.7 Hz, 3H), 7.70 (d, J = 8.6 Hz, 1H), 7.64 – 7.42 (m, 4H), 7.39 (d, J = 8.6 Hz, 1H), 3.73 (dt, J = 28.1, 7.3 Hz, 2H), 1.82 – 1.74 (m, 2H), 1.02 (t, J = 7.4 Hz, 3H). ¹³C{¹H} NMR (101 MHz, CDCl₃) δ 171.0, 135.7, 133.7, 133.1, 130.7, 128.9, 128.0, 127.7, 127.4, 126.5, 126.4, 126.2, 40.2, 22.0, 11.4. HRMS (EI) m/z: calcd for C₂₇H₂₁NO₂, 391.1572; found, 391.1568.