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} |
31 | .~ Compound contains a ring which is devoid of a metal atom as ring member and wherein the ring contains at least one atom other than C, N, O, S, P, Se, or Te as a ring atom; e.g., boron, etc. (9/6596) |