570 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
* | DD | ORGANIC COMPOUNDS (Class 532, Subclass 1) {1} |
101 | DF | .~ HALOGEN CONTAINING {21} |
123 | DF | .~.~ Fluorine containing {21} |
152 | .~.~.~ Decreasing molecular weight of polymer of indeterminate structure |