| TEST | SPECIFICTIONS |
| Description | A white or almost white, amorphous powder; hygroscopic |
| Identification | According to the requirements |
| Specific optical rotation | +25.0°~+30.0°(C=1,in Ethanol) |
| Water content | ≤3.0% |
| 15-epimer | ≤0.5% |
| 5,6-trans isomer | ≤2.0% |
| (-)-enantiomer | ≤2.0% |
| Other max single impurity | ≤0.5% |
| Impurities total | ≤2.5% |
| Residue solvents | Methanol≤0.3% |
| Toluene≤0.089% | |
| Tetrahydrofuran≤0.072% | |
| Ethyl acetate≤0.5% | |
| Dichloromethane≤0.06% | |
| Purity (HPLC) | ≥98.5% |
| Conclusion: | Complies with In-house standards. |