| 44 / | HD | FUEL AND RELATED COMPOSITIONS |
| 300 | DF | LIQUID FUELS (EXCLUDING FUELS THAT ARE EXCLUSIVELY MIXTURES OF LIQUID HYDROCARBONS) {31} |
| 412 | DF | .~ Organic nitrogen compound containing {12} |
| 413 | ![]() | .~.~ Nitro or nitroso bonded directly to carbon {1} |
| 414 | DF | .~.~.~> The carbon is acyclic or alicyclic |