β-lactam compounds process for reproducing the same...

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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C540S200000, C540S360000

Reexamination Certificate

active

07045515

ABSTRACT:
Novel β-lactam compounds represented by the following formula (I) or pharmaceutically acceptable salts thereof which are useful as serum cholesterol-lowering agents:(I) wherein A1, A3and A4represent each hydrogen, halogen C1-5alkyl, C1-5alkoxy, —COOR1, a group represented by the following general formula (b): (b) wherein R1represents hydrogen or C1-5alkyl, or a group represented by the following general formula (a): (a) wherein R2represents —CH2OH, —CH2OC(O)—R1or —CO2—R1; R3represents —OH or —OC(O)—R1; R4represents —(CH2)kR5(CH2)1-wherein K and 1 are each 0 or an integer of 1 or above provided k+1 is an integer of not more than 10; and R5represents a single bond, —CH═CH—, —OCH2—, carbonyl or —CH(OH)—; provided that at least one of A1, A3and A4is a group represented by the above formula (a); A2represents C1-5alkyl, C1-5alkoxy, C1-5alkenyl, C1-5hydroxyalkyl or C1-5carbonylalkyl; and n, p, q and r are each an integer of 0, 1 or 2.

REFERENCES:
patent: 5412092 (1995-05-01), Rey
patent: 6703386 (2004-03-01), Glombik et al.
patent: 0 076 621 (1983-04-01), None
patent: 0 524 595 (1993-01-01), None
patent: WO 95/08532 (1995-03-01), None
patent: WO 97/16424 (1997-05-01), None
patent: WO 97/16455 (1997-05-01), None

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