CA2514407C — Thienopyrimidine compounds and use thereof

USPTO Abstract

The present invention provides a compound represented by the formula: (see above formula) wherein R1 is a C1-4 alkyl; R2 is (1) a 5- to 7-membered nitrogen-containing heterocyclic group which may have a substituent selected from the group consisting of (1') a halogen, (2') a hydroxy group, (3) a C1-4 alkyl and (4') a C1-4 alkoxy, (2) a phenyl which may have a substituent selected from the group consisting of (1') a halogen, (2') a C1-4 alkoxy-C1-4 alkyl, (3') a mono-C1-4 alkyl-carbamoyl-C1-4 alkyl, (4) a C1-4 alkoxy and (5') a mono-C1-4 alkylcarbamoyl-C1-4 alkoxy, or the like; R3 is a C1-4 alkyl; R4 is a alkoxy, or the like; n is an integer of 1 to 4; or a salt thereof, as a thienopyrimidine compound having gonadotropin-releasing hormone antagonistic activity.