• أفضل تطابق في المكتبة: 3-Phenylfuran-2,5-dione #11733

• The library similarity is low (0.622), indicating that the match is not clear-cut; the sample could be a derivative, isomer, or mixture containing the proposed anhydride structure.
• Broad O-H stretching bands around 3726 cm⁻¹ suggest the presence of moisture or hydroxyl groups, which could arise from partial hydrolysis of the anhydride; this does not contradict the assignment but adds uncertainty about the sample's integrity.

الخطوات التالية الموصى بها: Use complementary techniques (e.g., GC-MS, NMR, or Raman) to confirm the presence of a maleic anhydride moiety and the phenyl substituent. If possible, run the sample after drying to test for the persistence of the anhydride bands and to evaluate potential hydrolysis.