PROBLEM TO BE SOLVED: To provide an effective ocular hypotensive agent and a widely applicable smooth muscle relaxant.
SOLUTION: A cyclopentaneheptanoic acid, 2-cycloalkyl or arylalkyl derivative substituted with halo, methyl, hydroxy, nitro, amino, amide, azide, oxime, cyano, thiol, ether or thioether group at the 1-site, is provided, e.g. 1-OH-cyclopentaneheptanoic acid, 2-(cycloalkyl or arylalkyl) derivative. The derivative is an effective ocular hypotensive agent, being suitable for treating glaucoma in particular. Further, the derivative is a smooth muscle relaxant widely applicable to systemic hypertensive and pulmonary diseases, also being applicable to gastrointestinal diseases, reproduction, fertility, incontinence, shock, etc.
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