Nitrogen Atom As Part Of A Hetero Ring Dnrm Patents (Class 524/86)
- Tetrabenzoporphyrazine nucleus containing, e.g., phthalocyanine, etc. (Class 524/88)
- Nitrogen ring is part of a ring system having three or more rings fused or bridged together (Class 524/89)
- Three or more nitrogen atoms in the fused or bridged ring system (Class 524/91)
- Two nitrogen atoms in the fused or bridged ring system (Class 524/92)
- Five-membered nitrogen containing ring (Class 524/94)