| 568 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| * | DD | ORGANIC COMPOUNDS (Class 532, Subclass 1) {4} |
| 300 | DF | .~ OXYGEN CONTAINING (E.G., PERCHLORYLBENZENE, ETC.) {11} |
| 700 | DF | .~.~ Hydroxy containing (H of -OH may be replaced by a Group IA or IIA light metal) {10} |
| 816 | DF | .~.~.~ Plural alicyclic rings containing {1} |
| 817 | DF | .~.~.~.~ Polycyclo ring system {2} |
| 819 | | .~.~.~.~.~ Bicyclo ring system {1} |
| 820 | DF | .~.~.~.~.~.~> The two cyclos share at least three ring carbons (i.e., bridged ring) |