Antihypertensive 2-(1,3-Dioxolan-2-yl)-2-methyl-6-nitro-4-(2-oxo-1-pyrrolidinyl)-2H-1-benzopyran

The title compound, 1-[2-(1,3-dioxolan-2-yl)-2-methyl-6-nitro-2H-1-benzopyran-4-yl]-2-pyrrolidinone, C₁₇H₁₈N₂O₆, is a highly potent potassium-channel activator. The dioxolane moiety is in the pseudo-axial position. The overall conformation, in terms of the relative orientation of the oxopyrrolidine ring with respect to the benzopyran ring, is similar to that of cromakalim.

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