Dihydropyridine derivatives

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...

Reexamination Certificate

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C514S311000, C514S314000

Reexamination Certificate

active

07994189

ABSTRACT:
The present invention relates to dihydropyridine derivatives having general formula (I) or a pharmaceutically acceptable salt thereof, wherein R1is (1-6C)alkyl, (2-6C)alkenyl, (2-6C)alkynyl, phenyl, (1-5C)heteroaryl R2, R3are independently (1-4C)alkyl, (2-4C)alkenyl, (2-4C)alkynyl, (1-4C)alkoxy, (24C)alkenyloxy, (2-4C)alkynyloxy, halogen X is SO2, CH2, C(O) or X is absent R4is (1-6C)alkyl, (2-6C)alkenyl, (2-6C)alkynyl, (3-6C)cycloalkyl, (3-6C)cycloalkenyl, (3-6C)cycloalkyl(1-4C)alkyl, (2-6C)heterocycloalkyl, (2-6C)heterocycloalkyl(14C)alkyl, (6-1 OC)aryl, (6-10C)aryl(1-4C)alkyl, (1-9C)heteroaryl or (1-9C)heteroaryl(14C)alkyl. The compounds are useful for the treatment of fertility disorders.

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