1. Begin with a quinoline ring (i.e., a fused bicyclic aromatic ring), which consists of:
    - Ring A: a six-membered ring composed of N1, C2, C3, C4, C5, and C6.
    - Ring B: a phenyl ring sharing two carbon atoms (C5 and C6) with Ring A.
2. At C2, an -NH-C(=O)- linkage is attached, and the carbonyl carbon of this linkage is bonded to another fused ring system resembling a 2H-chromene structure.
3. The second fused ring system comprises:
    - Ring C: labeled as O7, C8, C9, C10, C11, and C12.
    - Ring D: a phenyl ring labeled as C11, C12, C13, C14, C15, and C16, sharing C11 and C12 with Ring C.
    - The carbonyl carbon is linked to C9; C9 is double bonded to C10; and a single chlorine substituent is attached to C15.
