• أفضل تطابق في المكتبة: (8-methyl-8-azabicyclo[3.2.1]octan-3-yl) 2-hydroxy-2-phenylacetate #21987

• Library similarity is essentially zero, and the direct evidence at 1068 cm−1 attributes the band to Si–O [3], which is inconsistent with an organic ester; this may indicate sample contamination or misattribution.
• The low library confidence, the lack of characteristic tropane skeleton bands, and the presence of a carbonate-like signal at 1406 cm−1 keep the exact identity unresolved.

الخطوات التالية الموصى بها: Confirm the molecular structure using mass spectrometry or NMR. A search in a library optimized for alkaloid esters may provide a closer match. If carbonate functionality is suspected, compare with authentic carbonate ester standards.