| 568 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| * | DD | ORGANIC COMPOUNDS (Class 532, Subclass 1) {4} |
| 18 | DF | .~ SULFUR CONTAINING {9} |
| 38 | DF | .~.~ Thioethers {5} |
| 59 | DF | .~.~.~ Acyclic {1} |
| 60 | ![]() | .~.~.~.~ Symmetrical (e.g., dimethyl sulfide, etc.) |