Six Atoms In Ring Containing The Single N Atom (9/576) Patents (Class 987/92)
- C atom of ring is bonded directly to a P atom (9/58K; 9/58K4) (Class 987/100)
- C atom of ring is bonded directly to a hetero atom other than N and which hetero atom is bonded directly to a P atom (9/58K2) (Class 987/101)
- N atom of ring is bonded directly to a P atom or indirectly to a P atom other than through a ring atom of the pyridine ring (9/58E) (Class 987/102)
There are no patents to show for this class.