(2aS,2bR,3S,4S,6S,8aR,10S,11aS,11bR,13aR)-2a-(acetyloxy)-6-{[(2R,3S)-3-[(tert-butoxycarbonyl)amino]-3-(3-fluoropyridin-2-yl)-2-hydroxypropanoyl]oxy}-10-[(dimethylamino)methyl]-4-hydroxy-7,11b,14,14-tetramethyl-2a,2b,3,4,5,6,8a,11a,11b,12,13,13a-dodecahydro-2H-4,8-methano[1,3]dioxolo[3,4]cyclodeca[1,2-d][1]benzoxet-3-yl benzoate