I don't think it's very likely that there is, even on the web, a database of graphic depictions of spectra for obscure organic compounds. So your instructor, has simply steered you wrong, if they implied it would be simple to find. Maybe, online texts have simple compounds, as teaching aids, but such an obscure compound, who would be likely to have it around, scanned, and waiting for you?
Oh, and once your class IR is fixed, I'll need a uploaded scan of 1,3 dichloro
anthracene-9, 10-a,ß-succinic acid
, and quickly, quickly, if somone in your class got it already, please. Please.
Just kidding, I don't need that for any reason.
But you see the problem your question posed.