sentence2_structure: An amine<>is<>an organic compound that can be considered to be a derivative of ammonia$$$an organic compound<>to be<>a derivative of ammonia
sentence1: Amine Derivatives of ammonia in which one or more hydrogen atoms have been replaced by organic groups.
sentence2: An amine is an organic compound that can be considered to be a derivative of ammonia.
question: An amine is an organic compound that can be considered to be a derivative of what?