| 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} |
| 13 |  | .~.~ Phosphorus containing {6} |
| 14 | DF | .~.~.~> Additional diverse heavy metal or aluminum containing |
| 15 | DF | .~.~.~> The heavy metal is bonded directly to the carbon of a -C(=X)- group, wherein X is chalcogen (e.g., cyclopentadienyl manganese dicarbonyl triphenyl phosphine, etc.) {1} |
| 17 | DF | .~.~.~> Plural phosphori bonded directly to the same nitrogen or chalcogen (e.g., pyrophosphates, etc.) |
| 18 | DF | .~.~.~> Plural phosphori bonded directly to the same carbon or attached to each other by an acyclic chain which chain consists of carbons or of carbons and chalcogens |
| 19 | DF | .~.~.~> Carbon bonded directly to the phosphorus {1} |
| 24 | DF | .~.~.~> Exactly four chalcogens bonded directly to the phosphorus (e.g., phosphates, orthophosphates, etc.) {2} |