| 556 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
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| * | DD | ORGANIC COMPOUNDS (Class 532, Subclass 1) {3} |
| 1 | DF | .~ HEAVY METAL CONTAINING (e.g., Ga, In or T1, etc.) {19} |
| 64 | DF | .~.~ Arsenic, antimony, or bismuth containing (As, Sb, or Bi) {5} |
| 76 | DF | .~.~.~ Chalcogen bonded directly to the metal {2} |
| 77 |  | .~.~.~.~ Containing -C(=X)X-, wherein the X's are the same or diverse chalcogens {2} |
| 78 | DF | .~.~.~.~.~> Carbocyclic ring bonded directly to the carbon of the -C(=X)X- group |
| 79 | DF | .~.~.~.~.~> The carbons of plural -C(=X)X- groups are bonded directly to each other, to the same carbon, or to a chain consisting of carbons, which carbons may be part of a ring (e.g., bismuth tartrates, etc.) |