Table 2. Evaluation of the accuracy of the pEI library search method for six compounds that were not registered in NIST 20.
| Compound name | Formula | Similarity | Rank: pEI library search | Rank: brute-force search |
|---|---|---|---|---|
| Cafenstrole | C16H22N4O3S | 0.741 | 3 (2933) | 229 |
| MCPA-thioethyl | C11H13ClO2S | 0.735 | 1 (729) | 232 |
| Propaphos | C13H21O4PS | 0.802 | 1 (27) | 1 |
| CNP-amino | C12H8Cl3NO | 0.710 | 14 (618) | 1254 |
| Butamifos oxon | C13H21N2O5P | 0.675 | 1 (56) | 12822 |
| Isoxadifen-ethyl | C18H17NO3 | 0.586 | 22 (5348) | 42199 |