“…Yellow oil (0.475 g, 29%). 1 H NMR (700 MHz, CD 3 OD): δ 7.86 (d, J = 2.1 Hz, 1H), 7.56 (dd, J = 8.6, 2.2 Hz, 1H), 7.26 (d, J = 8.6 Hz; 1H), 4.30-4.24 (m, 2H), 4.19-4.17 (m, 1H), 3.55 (s, 2H, -CH 2 CO-), 3.50-3.43 (m, 1H, -CH(CH 3 ) 2 ), 3.33-3.24 (m, 2H, -CH 2 NH-), 1.39 (d, J = 2.8 Hz, 3H, -CH 3 ), 1.37 (d, J = 2.8 Hz, 3H, -CH 3 ). 13 C NMR (175 MHz, CD 3 OD): δ 175.8, 151.9, 140.8 (-CNO 2 ), 136.5, 130.6, 127.2, 116.2, 72.5 (-CH 2 O-), 66.4 (-CHOH), 52.2 (-CH(CH 3 ) 2 ), 48.5 (-CH 2 NH-), 41.5 (-CH 2 CO-), 19.3 (-CH 3 ), 18.8 (-CH 3 ).…”