Substituted...

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2009-11-06

2010-12-28

Saeed, Kamal A (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

active

07858805

ABSTRACT:
The invention relates to processes for the preparation of compounds of general formula (I) and salts thereof:in whichQ1represents O,Q2represents O,R1represents —CH3,R2represents —CH3,R3represents —OCH3, andR4represents —CH3.

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