| Peaks (cm−1) | Peak assignment |
| 3300 ‐ 3200 | stretching vibration of OH groups |
| 2950 ‐ 2900 | Aromatic, cyclic enes Alkyl groups υ = CH & Ar‐H |
| 2750 | CH3 of Alkyl groups |
| 1900 - 1500 | double-bonded functional groups |
| 1750 - 1700 | stretching vibration of carbonyl C=O group of acids |
| 1650 - 1550 | N‐H bending vibration of quinolones |
| 1580 ‐ 1500 | CH3 and CH2 of Alkyl groups |
| 1500 - 1400 | stretching vibration of CH2 in Benzoxazine |
| 1400 ‐ 1350 | O‐H bending vibration of carboxylic acid |
| 1352, 1283 | stretching vibration of C-N |
| 1250 ‐ 1200 | C‐O‐C stretching vibration of Oxo group |
| 1050 - 1000 | stretching C-F group of Fluorine group |
| 950 ‐ 800 | =C‐H out of plane bending vibration of Aromatics & enes |