| 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} |
| 356 | | .~.~ Six-membered ring (9/65B6) {3} |
| 357 | DF | .~.~.~> N in 1 and 4 positions (9/65B64; 9/65B64E; 9/65B64K; 9/65B4V) |
| 358 | DF | .~.~.~> N in 1 and 3 positions (9/65B63; 9/65B63E; 9/65B63G; 9/65B63J; 9/65B63K; 9/65B63K2; 9/65B63K4; 9/65B63M; 9/65B63R; 9/65B63V) |
| 359 | DF | .~.~.~> N in 1 and 2 positions (9/65B62; 9/65B62E; 9/65B62J; 9/65B62K; 9/65B62M; 9/65B62V) |