A novel dicyanotriterpenoid, 2-cyano-3,12-dioxooleana-1,9(11)-dien-28-onitrile, active at picomolar concentrations for inhibition of nitric oxide production

Bioorganic & Medicinal Chemistry Letters
Tadashi HondaMichael B Sporn

Abstract

New oleanane triterpenoids with various substituents at the C-17 position of 2-cyano-3,12-dioxooleana-1,9(11)-dien-28-oic acid (CDDO) and methyl 2-carboxy-3,12-dioxooleana-1,9(11)-dien-28-oate were synthesized. Among them, 2-cyano-3,12-dioxooleana-1,9(11)-dien-28-onitrile shows extremely high inhibitory activity (IC(50)=1 pM level) against production of nitric oxide induced by interferon-gamma in mouse macrophages. This potency is about 100 times and 30 times more potent than CDDO and dexamethasone, respectively.

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