1H-​as-​Indaceno[3,​2-​d]​oxacyclododecin-​7,​15-​dione, 2-​[(6-​deoxy-​3-​O-​ethyl-​2,​4-​di-​O-​methyl-​α-​L-​mannopyranosyl)​oxy]​-​9-​ethyl-​2,​3,​3a,​4,​5,​5a,​5b,​6,​9,​10,​11,​12,​13,​14,​16a,​16b-​hexadecahydro-​13-​hydroxy-​14-​methyl-​, (2R,​3aR