Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...
Patent
1988-11-29
1989-12-12
Gerstl, Robert
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Having -c-, wherein x is chalcogen, bonded directly to...
544256, C07D47104, A01R 31505
Patent
active
048868078
ABSTRACT:
Pyrimidopyrimidine derivatives having the general formula ##STR1## wherein R.sub.1 is an alkyl group;
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Kitamura Norihiko
Ohnishi Akimoto
Gerstl Robert
Nippon Zoki Pharmaceutical Co. Ltd.
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