O1c2c(C(=O)C=C1C3(C)OC3C)c(C)cc4C(=O)c5c(c(O)cc(C6OC(C)C(O)C(C)(C6)N(C)C)c5C7OC(C)C(O)C(C7)N(C)C)C(=O)c24