The product of Example 324C (0.167 g, 0.30 mmol) in tetrahydrofuran (6 mL) and methanol (0.030 mL, 0.8 mmol) at 0° C. was reacted with lithium borohydride (2.0 M solution in tetrahydrofuran, 0.250 mL, 0.50 mmol). The reaction was stirred at 25° C. for 1.5 hour, acidified to pH 2 with 1 M aqueous hydrochloric acid and diluted with water (25 mL). The resulting precipitate was collected by filtration and dried to constant weight to give the title compound (0.114 g, 69%). MS (APCI+) m/z 551 (M+H)+. 1H NMR (300 MHz, DMSO-d6) δ ppm 1.36 (m, 10 H) 5.25 (s, 2 H) 6.50 (s, 1 H) 7.43 (m, 8 H) 7.69 (d, J=8.82 Hz, 1 H) 8.29 (d, J=5.15 Hz, 1 H) 14.10 (s, 1 H) 14.87 (s, 1 H).
