PIPERLDINUM COMPOUNDS FOR TREATMENT OF OBSTRUCTIVE PULMONARY DISEASES ( COPD)
The invention provides compounds of formula (I), wherein R<SUP>1</SUP>, R<SUP>2</SUP>, R<SUP>3</SUP>, R<SUP>4</SUP>, R<SUP>5</SUP>, R<SUP>6</SUP>, g, h and X are as defined in the specification, a process for their preparation, pharmaceutical compositions containing them, a process for preparing pharmaceutical compositions, their use in therapy and intermediates of use in their preparation.