| 562 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| * | DD | ORGANIC COMPOUNDS (Class 532, Subclass 1) {41} |
| 840 | DF | .~ Carboxylic halides (i.e., compounds having the -C(=O)-halo group) {11} |
| 856 | DF | .~.~ Processes {7} |
| 857 | | .~.~.~ Phosgene reactant |