Triazolophthalazines

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

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C544S234000, C544S115000

Reexamination Certificate

active

07851472

ABSTRACT:
The compounds of formula Iin which R1 and R2 have the meanings as given in the description are novel effective PDE2 inhibitors.

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