This study successfully developed the first batch of national reference standards of caspofungin acetate to ensure quality control of related raw materials and finished products.
The structure of the caspofungin acetate reference standard was confirmed by comprehensive analytical techniques including high-resolution mass spectrometry (HRMS), nuclear magnetic resonance (NMR), and infrared spectroscopy (IR), and the NMR signals of the compound were assigned. The content of caspofungin acetate was determined by the mass balance method (MBM), and the results were corroborated by quantitative nuclear magnetic resonance (qNMR) and the external standard method (ESM).
The content of this batch of caspofungin acetate reference standard, calculated as C52H88N10O15·2CH3COOH, was 97.0%.
The first batch of national reference standards of caspofungin acetate was successfully developed.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |