PTP1B inhibitory and cytotoxic C-24 epimers of Δ28-24-hydroxy stigmastane-type steroids from the brown alga Dictyopteris undulata Holmes.
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DOI: 10.1016/j.phytochem.2017.11.013
Abstract: Ten stigmastane-type steroids bearing unusual Δ28-24-hydroxy side chains, dictyopterisins A-J, including three pairs of C-24 epimers, dictyopterisins B/C, F/G, and I/J, were isolated from the brown alga Dictyopteris undulata Holmes, together with two previously reported… read more here.
Keywords: undulata holmes; dictyopteris undulata; alga dictyopteris; type steroids ... See more keywords
Stigmastane-type steroid saponins from the leaves of Vernonia amygdalina and their α-glucosidase and xanthine oxidase inhibitory activities.
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DOI: 10.1080/14786419.2023.2188589
Abstract: Two new vernonioside K (1) and vernonioside L (2) and four known Δ7,9(11) stigmastane-type steroidal saponins-vernonioside B2 (3), vernoniacum B (4), vernonioside B1 (5), and vernoamyoside A (6)-were isolated from the leaves of Vernonia amygdalina.… read more here.
Keywords: glucosidase xanthine; vernonia amygdalina; oxidase; stigmastane type ... See more keywords