Dihydropyridine and pyridine derivatives and process for their preparation
申请人:PHARMACIA & UPJOHN S.p.A.
公开号:EP0755931A1
公开(公告)日:1997-01-29
A steroidal aromatase inhibitor compound of the following formulae (I) and (II)
wherein:
Het is
n is zero or 1;
R1 is hydrogen, halogen, trihalomethyl or C1-C3 alkyl;
R2 is cyano or COOR, wherein R is C1-C6 alkyl either unsubstituted or omega substituted by C1-C3 alkoxy;
each of R3 and R4, which may be the same or different, is a C1-C4 alkyl group, and
R5 is hydrogen or a C1-C4 alkyl group, and the pharmaceutically acceptable salts thereof;
is provided.