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  • Title: New amides from seeds of Silybum marianum with potential antioxidant and antidiabetic activities.
    Author: Qin NB, Jia CC, Xu J, Li DH, Xu FX, Bai J, Li ZL, Hua HM.
    Journal: Fitoterapia; 2017 Jun; 119():83-89. PubMed ID: 28400224.
    Abstract:
    Two new amide compounds, mariamides A and B (1-2), were obtained together with fourteen known compounds from the seeds of milk thistle (Silybum marianum). Their structures were established on the basis of extensive 1D and 2D NMR analyses, as well as HR-ESI-MS data. Most of the compounds showed significant antioxidant activities than positive control in ABTS and FRAP assays. However, only amide compounds 1-4 showed moderate DPPH radical scavenging activity and compounds 7 and 16 showed the most potent activity against DPPH. Most of the compounds showed moderate to stronger α-glucosidase inhibitory activities. Nevertheless, only flavonoids showed strong PTP1B inhibitory activities. These results indicate a use of milk thistle seed extracts as promising antioxidant and antidiabetic agents.
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