111367-04-5 3,5-Ethano-2H-furo(2,3-o)(2)benzoxacycloundecin-13-carboxylic acid, 3,3a,5,6,7,8,9,10,11,11a,14,15-dodecahydro-2,17-dioxo-16-methylene-3,6,8,14-tetramethyl-, (3R-(3R*,3aR*,5R*,6R*,8R*,11aS*,14S*,15aS*))- Okilactomycin YP-02908L-A