The FTIR evidence does not support a reliable assignment to the library top hit, 2-cyclopentylacetic acid, because the library match quality is effectively absent and no direct or related literature evidence narrows the identity. The observed spectrum is better described conservatively as an oxygenated organic material containing strong carbonyl absorption, with additional bands consistent with C-O functionality and possible aromatic or substituted ring contributions. The paired carbonyl-region bands at 1774 and 1716 cm-1 especially suggest a more complex carbonyl environment than a simple saturated monocarboxylic acid alone