| 44 / | HD | FUEL AND RELATED COMPOSITIONS |
| 300 | DF | LIQUID FUELS (EXCLUDING FUELS THAT ARE EXCLUSIVELY MIXTURES OF LIQUID HYDROCARBONS) {31} |
| 385 | DF | .~ Containing organic -C(=O)O- compound (e.g., fatty acids, etc.) {8} |
| 408 | DF | .~.~ Organic nitrogen compound salt of carboxylic acids {1} |
| 409 | ![]() | .~.~.~ Plural nitrogens in the organic nitrogen compound (e.g., diamines, aminoamides, guanidines, etc.) |