Trisubstituted pyrimido[5,4-d]pyrimidines and salts thereof

Drug – bio-affecting and body treating compositions – Antigen – epitope – or other immunospecific immunoeffector – Bacterium or component thereof or substance produced by said...

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424251, 42424856, 42424857, 4242484, 2602433, 544256, 544118, 544 582, 544 61, C07D40114, C07D41714, A61K 31505, C07D48704

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044788339

ABSTRACT:
Compounds of the formula ##STR1## wherein R.sub.1 is optionally substituted alkyl;

REFERENCES:
patent: 3031450 (1962-04-01), Fischer et al.
patent: 3074928 (1963-01-01), Roch et al.
patent: 3322755 (1967-05-01), Roch et al.

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