GB8416724D0 — Active compounds

USPTO Abstract

A pharmaceutical composition comprising a compound of formula (I) or a pharmaceutically acceptable salt thereof:wherein:R<sub>1</sub> is hydrogen, C<sub>1-6</sub> alkyl, C<sub>1-6</sub> alkoxy or halogen;R<sub>2</sub> and R<sub>3</sub> are both hydrogen or together represent a bond;R<sub>4</sub> is hydrogen and R<sub>5</sub> is hydrogen or R<sub>4</sub> and R<sub>5</sub> together represent on oxo group;R<sub>6</sub> is hydrogen; C<sub>1-6</sub> alkyl; C<sub>3-7</sub> cycloalkyl; C<sub>3-7</sub> cycloalkyl-C<sub>1-4</sub> alkyl; phenyl or phenyl C<sub>1-7</sub> alkyl in which the phenyl moiety is optionally substituted by one or two of halogen, ortho-nitro, meta-or para-methoxy, methyl or NR<sub>8</sub>R<sub>9</sub> wherein R<sub>8</sub> and R<sub>9</sub> are independently hydrogen or C<sub>1-6</sub> alkyl or R<sub>8</sub> and R<sub>9</sub> together are C<sub>2-6</sub> polymethylene, or 3,4-disubstituted by methylenedioxy or ethylenedioxy; or monocyclic heteroaryl-C<sub>1-4</sub> alkyl or aliphatic heterocyclyl-C<sub>1-4</sub> alkyl of up to six ring atoms, the heteroatom(s) being selected from oxygen, suphur or nitrogen, any amino nitrogen heteroatom optionally C<sub>1-4</sub> alkyl substituted; andR<sub>7</sub> is hydrogen or C<sub>1-4</sub> alkyl; and a pharmaceutically acceptable carrier.