Camptothecin derivatives with antitumor activity

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...

Reexamination Certificate

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C546S041000

Reexamination Certificate

active

08076351

ABSTRACT:
Novel camptothecin derivatives having antitumor activity, the processes for the preparation thereof, the use thereof as antitumor drugs and pharmaceutical compositions containing them.

REFERENCES:
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patent: 5972955 (1999-10-01), Duvvuri et al.
patent: 6177439 (2001-01-01), Duvvuri et al.
patent: 6214836 (2001-04-01), Duvvuri et al.
patent: 6265413 (2001-07-01), Jew et al.
patent: 0066127 (2000-11-01), None
Sugimori et al., “Antitumor Agents VI Synthesis and Antitumor Activity of Ring A-, Ring B-, and Ring C-Modified Derivatives of Camptothecin”, Heterocycles 38(1):81-94 (1994).

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