| S.No | Product Name | CAS Number | Structure |
| 1 | DES Methyl Impurity |
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| 2 | Methyl Ester Impurity |
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| 3 | DI Hydroxy Impurity |
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| 4 | Hydrazinyl Impurity |
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| 5 | Carboxamide Impurity |
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| 6 | Methyl Oxalate Impurity |
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| 7 | Ethyl Oxalate Impurity |
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| 8 | Formyl Impurity |
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| 9 | O-Methyl Impurity |
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| 10 | DES Fluoro Impurity |
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| 11 | BIS Carboxamide Impurity |
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| 12 | Prepene Impurity |
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| 13 | Nitrile Impurity |
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| 14 | R-Isomer Impurity |
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| 15 | Hypoxanthine Impurity |
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| 16 | 6-Chloro Purine Impurity |
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| 17 | Fumaric Acid Impurity |
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| 18 | Tenofovir Impurity |
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| 19 | Iso-Propyl Impurity |
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| 20 | S-Isomer Impurity |
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