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Characteristic peak of Nateglinide pure drug and optimized formula.
| Functional groups | Reported value (cm−1) | Observed value (cm−1) Pure drug |
Observed value (cm−1) Optimized formula |
|---|---|---|---|
| COOH | 3300–2500 | 3123.24 | 3126.84 |
| Carbonyls | 1760–1665 | 1690.97 | 1691.56 |
| Nitro compounds | 1550–1475 | 1487.80 | 1488.00 |
| Aliphatic amines | 1550–1475 | 1150.20 | 1150.63 |
