Cephalotaxanes, their method of preparation and their use in...

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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C540S543000, C540S581000

Reexamination Certificate

active

10403506

ABSTRACT:
The present invention concerns a compound of formula (I)wherein:W represents O or NH,Q represents an unbranched or branched, saturated or unsaturated or aromatic, cyclic or acyclic or heterocyclic hydrocarbon radical containing 1 to 30 carbon atoms including or not heteroatom(s),R1is H, OH, or R1, R2form together —O—,R3═R4═OMe or R3and R4form together —OCH2O—,R is H, C1-C30alkyl or O-protecting group and R6represents an unbranched or branched, saturated or unsaturated or aromatic, cyclic or acyclic or heterocyclic hydrocarboned radical containing 1 to 30 carbon atoms including or not heteroatom(s), or R and R6form together —CMe2-,n is 0 to 8,R5is H, OH, OMe, O—(C1-C30)-alkyl, O-aryl-(C1-C30)-alkyl, O—(C2-C30)-alkenyl, O—(C3-C30)-cycloalkyl or O-aryl,the dotted line is null or forms a double bond depending on the meaning of R1.It also concerns their methods of preparation and their use in treatment of cancers, leukemias, parasites and as reversal agents of harringtonines.

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