17 (m, 1H), four.52?.63 (m, 1H), 6.57 (m, 1H), 6.92 (m, 1H). 13C NMR (CDCl
17 (m, 1H), 4.52?.63 (m, 1H), 6.57 (m, 1H), 6.92 (m, 1H). 13C NMR (CDCl3, 50 MHz) 14.0, 20.two, 20.six, 22.6, 24.eight, 24.9, 26.7, 29.two, 29.2, 29.three, 29.four, 29.five, 30.8,…