“…6, 3.6 Hz, H-77!,,), 0.23 ( l H , d t , J=7.6, 7.6 Hz, H-7 ",,,, ), 1. m,,,,,4<\,,,1,6),2.62 (2H,m,,,.,,,,4,,,.,,,),4.07 (2H,m,5),m,; 151.5 (C-lo), 152.1 (C-8,12), 153.0 (C-9,1 I), 172.2 (C-5a,12a). (66): 'H-NMR (CD2Cl2): 6 = 1.10-IS0 (4H, m, H-I, 6, 3,,,,, 4?,,,), 1.57-1.77 (2H, m, H-7.,,,.,,,,,), 1.…”