¹³C NMR (176 MHz, CDCl₃) δ 155.07 (s, 1C), 148.40 (s, 1C), 138.72 (s, 1C), 132.68 (q, J = 33.6 Hz, 1C), 125.99 (s, 1C), 123.14 (q, J = 272.9 Hz, 1C), 119.80 (d, J = 3.4 Hz, 1C), 118.96 (s, 1C), 118.11 (m, J = 3.8 Hz, 1C), 115.20 (s, 1C).