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| # | Reference | CAS | Similarity |
|---|---|---|---|
| 1 | Paraxanthine | 611-59-6 | 0.749 |
| 2 | Soil - Open Soil Spectral Library (ICRAF/AfSIS) sample 12097 | - | 0.618 |
| 3 | Soil - Open Soil Spectral Library (ICRAF/AfSIS) sample 12061 | - | 0.586 |
| 4 | 1-ethylpiperazine-2,3-dione | - | 0.583 |
| 5 | 1-ethylpiperazine-2,3-dione | - | 0.583 |
| 6 | Charcoal - sedimentary fragment sample FTIR_S_0059 | - | 0.579 |
| 7 | Charcoal - sedimentary fragment sample FTIR_S_0006 | - | 0.579 |
| 8 | Soil - Open Soil Spectral Library (ICRAF/AfSIS) sample 11749 | - | 0.579 |
| 9 | Charcoal - sedimentary fragment sample FTIR_S_0491 | - | 0.578 |
| 10 | Soil - Open Soil Spectral Library (ICRAF/AfSIS) sample 11968 | - | 0.577 |
| 11 | Unknown compound - Chemotion IR (chem_01104) | - | 0.577 |
| 12 | Charcoal - sedimentary fragment sample FTIR_S_0445 | - | 0.574 |
| 13 | Soil - Open Soil Spectral Library (ICRAF/AfSIS) sample 11871 | - | 0.574 |
| 14 | Charcoal - sedimentary fragment sample FTIR_S_0439 | - | 0.573 |
| 15 | Charcoal - sedimentary fragment sample FTIR_S_0011 | - | 0.572 |
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