The FTIR pattern supports a broad assignment to a nitrogen-containing aliphatic carbonyl compound rather than a secure identification of the specific library hit. The sample shows a strong carbonyl band near 1690 cm⁻1 together with aliphatic C–H stretches at 2926 and 2866 cm⁻1 and several C–O/C–N region bands at 1273, 1189, and 1152 cm⁻1. Taken together with the Top-15 library pattern, this is most consistent with an amine-containing ester or carbamate-like material, potentially associated with a saturated nitrogen heterocycle. However, the library match quality is effectively non-discriminating, and no direct or related literature evidence independently supports the named top candidate