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} |
426 | DF | .~.~ Benzene ring bonded directly to the nitrogen {3} |
427 | DF | .~.~.~ Chalcogen attached directly or indirectly to the benzene ring by nonionic bonding {1} |
428 | .~.~.~.~ Acyclic carbon bonded directly to the nitrogen |