¹H NMR (400 MHz, CDCl₃) δ 2.45-2.24 (m, 4H), 1.58-1.46 (m, 2H), 1.34-1.13 (m, 4H), 0.98 (t, J = 7.3 Hz, 3H), 0.82 (t, J = 7.0 Hz, 3H). ¹³C{H} NMR (101 MHz, CDCl₃) δ 211.7, 42.2, 35.7, 31.3, 23.5, 22.3, 13.8, 7.7。