| 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 |
| 30 | DF | PHOSPHORUS COMPOUNDS (9/02; 9/06) {15} |
| 217 | DF | .~ P is trivalent and contains the structure P-(O-C) or P-(O-Z) where Z is an atom other than H (9/141; 9/141A1) {4} |
| 219 | DF | .~.~ Containing the structure P-(O-carbocyclic ring) (9/145) {2} |
| 220 | | .~.~.~ Ring is other than aryl (9/144) |