Purine derivatives having phosphodiesterase iv inhibition activity
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United States of America Patent
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Jul 2, 2002
Issued Date -
N/A
app pub date -
Mar 31, 2000
filing date -
Apr 2, 1999
priority date (Note) -
Expired
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Abstract
Disclosed are compounds of the formula: ##STR1## wherein R.sup.3, R.sup.6a, R.sup.6b and R.sup.8 are substituted as disclosed herein. The compounds are effective in effecting PDE IV inhibition in patients in need thereof.
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