Cl.COC(=O)C1(O)C(OC(=O)C)C2(CC)C=CCN3CCC4(c5cc(c(OC)cc5N(C=O)C14)C6(CC7C(=O)N(CCC8=C6Nc9ccccc89)CC%10(CC)OC7%10)C(=O)OC)C23