What region of the IR spectrum would be the most useful in distinguishing between the following two compounds? 
Definitions:
Black Swan Records
The first major African American-owned record label in the United States, founded in the early 1920s.
Lucrative Market
A market segment that offers the potential for significant profits.
Eubie Blake
An African American composer and pianist, notable for his contributions to the development of jazz and ragtime music.
Noble Sissle
An influential African-American jazz composer, lyricist, and band leader of the early 20th century, known for his collaboration with Eubie Blake.
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