| 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} |
| 355 | DF | .~ Ring contains two N atoms (9/65B) {2} |
| 360 | | .~.~ Five-membered ring (9/65B5) {2} |
| 361 | DF | .~.~.~> N in 1 and 3 positions (9/65B53; 9/65B53E; 9/65B53G; 9/65B53J; 9/65B53K; 9/65B53M; 9/65B53R; 9/65B53V) |
| 362 | DF | .~.~.~> N in 1 and 2 positions (9/65B52; 9/65B52E; 9/65B52J; 9/65B52K; 9/65B52M) |