556 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
* | DD | ORGANIC COMPOUNDS (Class 532, Subclass 1) {3} |
1 | DF | .~ HEAVY METAL CONTAINING (e.g., Ga, In or T1, etc.) {19} |
110 | DF | .~.~ Copper, silver, or gold containing (Cu, Ag, or Au) {3} |
112 | .~.~.~ Carbon bonded directly to the metal |