“…Diastereomer 1: [α] 25 D = +39.7 (c 3.12, CHCl 3 ). 1 H-NMR (500 MHz, CDCl 3 ) δ 7.34-7.09 (m, 10H), 6.92 (d,J = 6.5 Hz,1H),5.37 (d,J = 3.5 Hz,1H),4.49 (t,J = 6.0 Hz,1H),1H),2.74 (bs,1H),1H),1H),2H), 0.71 (d,J = 7.0 Hz,3H). 128.9,128.5,126.2,125.8,81.2,69.9,37.7,35.1,32.4,12.3.…”