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} |
177 | DF | .~.~.~ Purification or recovery {3} |
180 | .~.~.~.~ Including extraction with organic liquid |