“…H NMR (500 MHz, CDCl 3 ) d 5.88 (dd, J = 17.3, 10.7 Hz, 1H), 5.19 (dd, J = 17.3, 1.5 Hz, 1H), 4.99 (dd, J = 10.6, 1.5 Hz, 1H), 3.80 (t, J = 7.2 Hz, 1H), 1.90 (ddd, J = 10.9, 8.3, 6.1 Hz, 1H), 1.83 (q, J = 7.3 Hz, 2H), 1.73 (ddd, J = 10.9, 8.3, 6.1 Hz, 1H), 1.32 (s, 3H), 1.23 (s, 3H), 1.13 (s, 3H). 13 C NMR (126 MHz, CDCl 3 ) d 143.85, 111.47, 85.70, 83.20, 71.27, 37.63, 27.39, 26.97, 26.46, 24.31.NMR data in accordance with literature [22]. Relevant NMR spectra and GC methods and traces can be found in the supporting information.…”