Reaction Steps
A mixture of methyl 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-((3-methoxy-3-oxopropyl)amino)-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)-2,3,3a,4,5,5a,5b,6,7,7a,8,11,11a,11b,12,13,13a,13b-octadecahydro-1H-cyclopenta[a]chrysen-9-yl)benzoate (15 mg, 0.024 mmol) and sodium hydroxide (0.238 mL, 0.238 mmol) in dioxane (1 mL) was heated up at 80° C. for 3 hours. The reaction mixture was cooled to room temperature and then filtered, the clear solution was purified by HPLC to provide the title compound as a white solid (5 mg, 33%). LCMS: m/e 602.43 (M+H)+, 2.25 min (method 10). 1H NMR (500 MHz, Acetic) δ 8.04 (d, J=8.2 Hz, 2H), 7.30 (d, J=8.2 Hz, 2H), 5.37 (d, J=4.9 Hz, 1H), 4.86 (s, 1H), 4.74 (s, 1H), 3.39 (t, J=4.4 Hz, 2H), 3.17-3.02 (m, 1H), 2.98-2.80 (m, 2H), 2.31-1.02 (m, 22H), 1.77 (s, 3H), 1.24 (s, 3H), 1.14 (s, 3H), 1.09 (s, 3H), 1.02 (s, 3H), 1.00 (s, 3H).
