Ring Is Devoid Of A P Or A Metal Atom And Contains At Least One Hereto Atom (o, S, N, Se, Or Te) And May Or May Not Contain C (9/547; 9/6524) Patents (Class 987/49)
- Six-membered ring containing exactly two N atoms as sole hetero atoms shares two of its adjacent C atoms with a five-membered ring containing exactly two N atoms as sole hetero shares; e.g., purine and analogs, etc. (9/6561E) (Class 987/51)
- Six-membered ring shares a N and C atom with a four-membered ring wherein the six-membered ring contains a C or hetero atom in position 5 and no other hetero atom, the four-membered ring contains the single N as hetero atom; e.g., cephalosporins and analogs, etc. (9/6561B) (Class 987/52)
- Five-membered ring shares a N and C atom with a four-membered ring wherein the six-membered ring contains a C or hetero atom in position 4 and no other hetero atom, the four-membered ring contains the single N as hetero atom; e.g., penicillins and analogs, etc. (9/6561A) (Class 987/53)
- Seven or more atoms in ring containing the single N atom (9/553A7) (Class 987/91)
- Six atoms in ring containing the single N atom (9/576) (Class 987/92)
- Five-membered ring containing a single N atom (9/572; 9/572G; 9/572K; 9/572K2; 9/572K4; 9/572R) (Class 987/103)
- Four-membered ring containing a single N atom is condensed or bridged to a carbocyclic ring system (9/568V) (Class 987/106)
- N atom of four-membered ring containing a single N atom is bonded directly to a P atom or indirectly to a P atom other than through a ring atom of the four-membered ring (9/568E) (Class 987/107)
- Three-membered ring containing a single N atom (9/564) (Class 987/108)
There are no patents to show for this class.
