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 | DF | .~ Ring contains a single N atom (9/65A) {5} |
368 | .~.~ Four-membered ring (9/65A4; 9/65A4E; 9/65A4V) |