: Spectra of the13C-NMR, δc (ppm): 86.982 (C2); 85.760 (C3); 82.905 (C4); 82.871 (C5); 72.097 (C6); 70.297 (C1).
Phổ 13 C-NMR, δc (ppm): 86,982 (C 2); 85,760 (C 3); 82,905 (C 4); 82,871 (C 5); 72,097 (C 6); 70,297 (C 1).