| 208 / | HD | MINERAL OILS: PROCESSES AND PRODUCTS |
| 308 | DF | FRACTIONATION {5} |
| 311 | DF | .~ Liquid extraction with solvents {11} |
| 322 | DF | .~.~ Organic solvent containing {8} |
| 325 | | .~.~.~ Heterocyclic {2} |
| 326 | DF | .~.~.~.~> Hetero-N-containing |
| 327 | DF | .~.~.~.~> Furfural and derivatives |