| 摘要 |
omega -Cycloalkyl-prostaglandin E2 derivatives of formula (I) <CHEM> wherein R is carboxy or hydroxymethyl; R<1> is oxo, methylene or halogen atom; R<2> is H, OH or C1-4 alkoxy; R<3> is H, C1-8 alkyl, C2-8 alkenyl, C2-8 alkynyl, C1-8 alkyl, C2-8 alkenyl or C2-8 alkynyl substituted by 1-3 substituents selected from halogen atom, C1-4 alkoxy, C3-7 cycloalkyl, phenyl, and phenyl substituted by 1-3 substituents selected from halogen atom, C1-4 alkyl, C1-4 alkoxy, nitro and trifluoromethyl; n is 0-4; and non-toxic salts thereof, prodrugs thereof and cyclodextrin clathrates thereof strongly bind on the EP2 subtype receptor. Therefore, they are useful for prevention and/or treatment of immunological diseases (autoimmune diseases, organ transplantation, etc.), asthma, abnormal bone formation, neuronal cell death, liver damage, abortion, premature birth or retina neuropathy of glaucoma etc.
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