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} |
57 | DF | .~.~ Chromium, molybdenum, or tungsten containing (Cr, Mo, or {2} |
61 | DF | .~.~.~ Containing -C(=X)X-, wherein the X's are the same or diverse chalcogens {2} |
63 | .~.~.~.~ Nitrogen or halogen containing |