| abstract |
A 9-aminoalkylfluorene of formula wherein: R<1> is hydroxy, cyano, CONR<6>R<7> in which R<6> and R<7> are independently hydrogen or alkyl; n is an integer from 3 to 5; R<2> and R<3> are independently hydrogen, alkyl, alkenyl or phenyl alkyl, or taken together with the adjacent nitrogen atom form a heterocyclic group optionally including one further heteroatom selected from oxygen and nitrogen, and which ring is optionally substituted by up to two alkyl groups; R<4> and R<5> are independently hydrogen, alkyl or halogen; provided that R<2> is hydrogen when R<1> is hydroxy; or a pharmaceutically-acceptable salt thereof, have been found to be very effective in the therapy of cardiac disorders, particularly cardiac arrythmias. |