I'm assuming that you used iTunes in some manner but did not actually buy the CD from the iTunes store. Correct?
If yes, then you imported it using something like this?
If I may ask, which of the 5 setting(s) did you select -- AAC, AIFF, Apple Lossless, MP3, or WAV?
Depending on the format, you could (theoretically) sort by KIND via the iTunes Library; click on Music; go across in the iTunes horiz. menu bar & select "View". Then scroll down to "Show View Options" and then tick the little box for "Kind" (which is to be found listed under the triangle selector "File")... & finally, select sort by "Kind". If it's in your library, then sorting like this can reveal something that is, otherwise, easily overlooked.
So...give it a look & let us know how it worked out for you, okay?