14727-56-1

rel-(6R,20S,21aR)-8,9-dimethoxy-1,3,4,16,17,20,21,21a-octahydro-2H,6H,18H-12,15-etheno-6,20-methanopyrido[2,1-l][1,9,13]benzodioxazacyclohexadecin-18-one