| 987 / | HD | ORGANIC COMPOUNDS CONTAINING A Bi, Sb, As, OR P ATOM OR CONTAINING A METAL ATOM OF THE 6TH TO 8TH GROUP OF THE PERIODIC SYSTEM |
| 350 | DF | PHOSPHORUS CONTAINING AT LEAST ONE NITROGEN ATOM AS SOLE HETERO ATOM (9/65) {4} |
| 363 | | .~ Ring contains a single N atom (9/65A) {5} |
| 364 | DF | .~.~> (O=)C-N-C(=O) group where C-N-C is part of the ring (9/65A9) |
| 365 | DF | .~.~> Ring contains at least seven ring atoms (9/65A7) |
| 366 | DF | .~.~> Six-membered ring (9/65A6; 9/65A6E; 9/65A6G; 9/65A6J; 9/65A6K; 9/65A6K2; 9/65A6K4; 9/65A6M; 9/65A6R; 9/65A6V) |
| 367 | DF | .~.~> Five-membered ring (9/65A5; 9/65A5E; 9/65A5G; 9/65A5J; 9/65A5K; 9/65A5K2; 9/65A5K4; 9/65A5M; 9/65A5R; 9/65A5V) |
| 368 | DF | .~.~> Four-membered ring (9/65A4; 9/65A4E; 9/65A4V) |