Phosphorus Containing At Least One Nitrogen Atom As Sole Hetero Atom (9/65) Patents (Class 987/350)

Ring contains at least four nitrogen atoms (9/65d; 9/65d1; 9/65d2; 9/65d3; 9/65d3b) (Class 987/351)

Ring contains three nitrogen atoms (9/65c) (Class 987/352)

Ring contains two n atoms (9/65b) (Class 987/355)

Ring contains a single n atom (9/65a) (Class 987/363)

(O=)C-N-C(=O) group where C-N-C is part of the ring (9/65A9) (Class 987/364)
Ring contains at least seven ring atoms (9/65A7) (Class 987/365)
Six-membered ring (9/65A6; 9/65A6E; 9/65A6G; 9/65A6J; 9/65A6K; 9/65A6K2; 9/65A6K4; 9/65A6M; 9/65A6R; 9/65A6V) (Class 987/366)
Five-membered ring (9/65A5; 9/65A5E; 9/65A5G; 9/65A5J; 9/65A5K; 9/65A5K2; 9/65A5K4; 9/65A5M; 9/65A5R; 9/65A5V) (Class 987/367)
Four-membered ring (9/65A4; 9/65A4E; 9/65A4V) (Class 987/368)

There are no patents to show for this class.