O(C(=O)C)C(C)C1=C(C)C2=NC1=CC3=C(C)C(CCC(=O)O)=C(N3)C=C4N=C(C=C5NC(=C2)C(C(C)OC(=O)C)=C5C)C(C)=C4CCC(=O)O