Exactly Three N Atoms As Only Hetero Atoms In Ring (9/6515) Patents (Class 987/67)
- Five-membered ring is condensed or bridged to a carbocyclic ring system (9/6518V) (Class 987/72)
- C atom of ring is bonded directly to a P atom or is bonded directly to a hetero atom other than N and which hetero atom is directly bonded to a P atom (9/6518K) (Class 987/73)
- N atom of ring is bonded directly to a P atom or is bonded indirectly to a P atom other than through a ring atom of the five-membered ring (9/6518E) (Class 987/74)
There are no patents to show for this class.
