RESUMEN
High performance liquid chromatography coupled with on-line electrospray tandem mass spectrometry (HPLC/ESI-MS/MS) was used to identify C21 steroidal glycosides in the roots of Cynanchum atratum. The structures of C21 steroidal glycosides were deduced from mass fragments features in positive and negative mode. The constituents of C. atratum were separated and detected. 7 compounds were identified by comparing their ESI-MS/MS data with the reference compounds and 2 compounds were inferred solely by the ESI-MS/MS data. The method is sensitive, and provides good separation and rapid qualitative characterization of C21 steroidal glycosides in the roots of C. atratum.
Asunto(s)
Cromatografía Líquida de Alta Presión , Cynanchum , Química , Glicósidos , Química , Espectrometría de Masa por Ionización de Electrospray , Esteroides , Química , Espectrometría de Masas en TándemRESUMEN
This paper reported the acute toxicity test and the long-term toxicity test of Tongbi Tablets in rats and dogs. The LD_(50) of mice was 5.29g/kg. For dogs following oral administration (0.513g/kg/day, which was a tenth part of mice'LD_(50)) for 6 months running, the toxic symptom of strychnine-like and an increase in BUN could be-observed after 4-month administration. Both recoveried after breaking off the administration. For 0.051g/kg/day dosage group of dogs(administered for 6 months running)and all dosage groups of rats, no toxic symptom was observed, suggesting that the clinical dosage of this medicine was safe.