“…4a: yield 770 mg (93%) of white crystals; mp 136-137 °C; MS (FAB+, 3-NBA) 401 ( + H)+; -NMR (CD3OD) 1.30-3.00 (br m, 10 , B-H), 3.74 (a) 3.89 (b) (d of AB q, 2 H, H2-5', JMW = 12.46, J4'5a' = 2.83, J4-5a. = 2.36), 3.97-4.21 (m, 3 , H-2', H-3', H-4'), 4.20 (a) 4.27 (b) (AB q, 2 H, CH2Ccalboralle, J^= 11.3), 4.68 (br s, 1 H, C^g^H), 5.67 (d, 1 , H-5, J5,6 = 8.1), 5.84 (d, 1 H, H-V, Jr2 = 3.17), 8.05 (d, 1 H, H-6). Anal.…”