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Two new steroidal alkaloids, (20 S)-(bennzamido)-3β-(N,N-dimethyamino)-pregnane (1), and (20 S)-(bennzamido)-pregnane-3-one- (2), and two known steroidal alkaloids, pachysanaximine A (3) and 3β, 20α-diacetamido-5α-pregnane (4) were isolated from the whole plant of Sarcococca saligna. The structures of these compounds were identified with the help of spectroscopic techniques while spectra for known...
Buxus papillosa is one of the most extensively studied species of the genus Buxus known to possess steroidal alkaloids which can be used for assessing the various pharmacological activities of this plant. This paper describes the liquid chromatography–electrospray ionization triple quadrupole mass spectrometry (LC–ESI-QQQ-MS) method for the quantification of six steroidal alkaloids as chemical markers...
Rapid characterization of 23 pregnane-type steroidal alkaloids was studied using a positive ion electrospray ionization quadropole time-of-flight mass spectrometry (ESI-QqTOF–MS/MS) hybrid instrument. ESI-QqTOF–MS (positive ion mode) showed the presence of the protonated molecules [M+H] + which through low-energy collision-induced dissociation tandem mass spectrometric (CID–MS/MS) analysis...
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