| 585 / | HD | CHEMISTRY OF HYDROCARBON COMPOUNDS |
| 500 | DF | UNSATURATED COMPOUND SYNTHESIS {14} |
| 601 | DF | .~ Diolefin product {4} |
| 616 | DF | .~.~ By dehydrogenation {3} |
| 617 | DF | .~.~.~ Using nonhydrocarbon acceptor {2} |
| 621 | DF | .~.~.~.~ Elemental O acceptor {2} |
| 622 | DF | .~.~.~.~.~ With P containing extraneous agent {1} |
| 623 | | .~.~.~.~.~.~ Sn-containing |