13C NMR (101 MHz, CDCl3)
δ 180.41, 160.57, 158.84, 146.84, 146.11, 133.63, 131.90, 125.64, 123.80, 123.63, 122.30, 120.27, 117.58, 116.33, 105.19, 102.29, 91.78, 80.41, 41.76, 41.03, 27.23, 25.67, 22.68, 17.66.

附件是此化合物的基本骨架