The molecule is composed of two core skeletons:

1. A pyridine ring (six-membered aromatic ring containing one nitrogen atom).
2. An anthracene system (three linearly fused benzene rings, not bent but arranged in a straight line).

Substitution on the pyridine ring:
- At the carbon adjacent to the ring nitrogen, the ring bears a carboximidic acid group. This substituent consists of a carbon bonded to the pyridine ring, double-bonded to an imino nitrogen, and single-bonded to a hydroxyl oxygen (-OH).
- At the carbon meta to the pyridine nitrogen and ortho to the carboximidic acid substituent, the pyridine is linked to the anthracene system. The linkage is through an amino group (-NH-), which connects to a carbon atom of one of the outer benzene rings of anthracene. This carbon is ortho to the ring junction of anthracene.