| 534 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES | 
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| * |  | ORGANIC COMPOUNDS (CLASS 532, SUBCLASS 1) {8} | 
| 7 | DF | .~> Noble gas containing (i.e., He, Ne, Ar, Kr, Xe, or Rn containing) | 
| 10 | DF | .~> RADIOACTIVE METAL CONTAINING (At. No. 43, 61 or 84+; or radioactive isotope of another metal) {2} | 
| 15 | DF | .~> RARE EARTH METAL CONTAINING (At. No. 21, 39, 57-60 or 62-71) {1} | 
| 550 | DF | .~> Diazoamino (e.g., triazenes, etc.) {5} | 
| 556 | DF | .~> Diazooxide or diazotate (e.g., -N=N-0-, etc.) {1} | 
| 558 | DF | .~> Diazo or diazonium (e.g., -N=N-C, etc.) {7} | 
| 566 | DF | .~> Azoxy {5} | 
| 573 | DF | .~> Azo {51} |