4-hydroxy-benzopyran-2-ones and 4-hydroxy-cycloalkylb!pyran-2-ones useful to treat retroviral infections
 The present invention relates to compounds of formula I which are 4-hydroxy-benzopyran-2-ones and 4-hydroxy-cycloalkylb!pyran-2-ones useful for inhibiting a retrovirus in a mammalian cell infected with said retrovirus. ##STR1## Wherein R.sub.10 and R.sub.20 taken together are: ##STR2## 
Pharmacia & Upjohn Company
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Paul Kosta Suvit Lee S. Qingwei Richard C. Joseph Walter David John Paul D. Chih-Ping Steven Ronald Karen Rene Paul Adrian Michael John Gordon L. Harvey Irving Ronald B.
Tomich Thaisrivongs Banitt Zhang Thomas Strohbach Anderson Johnson Yang Turner Romines Aristoff Bohanon Bundy Skulnick Gammill