O=C1C(C(=O)OC)C2=C3NC(=CC4=NC(=CC5=C(C(=O)C)C(C)=C(C=C6N=C2C(CCC(=O)OCC=C(C)CCCC(C)CCCC(C)CCCC(C)C)C6C)N5)C(C)C4CC)C(C)=C13