This invention provides a compound of the formula (I):
1
wherein R
1
and R
2
independently represent a hydrogen atom or the like; X represents a covalent bond or the like: A represents a bicyclic, aromatic, saturated or partially unsaturated heterocyclic or carbocyclic group having from 8 to 12 ring atoms; or the like: B represents a phenyl group or a heteroaryl group having from 5 to 6 ring atoms or the like:
These compounds are useful for the treatment of disease conditions caused by overactivation of NMDA NR2B receptor such of pain, or the like in mammalian. This invention also provides a pharmaceutical composition comprising the above compound.
This invention relates to compounds of the formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 are as defined hereinbelow that exhibit activity as immunostimulants.
A derivative, which is useful as a ret kinase inhibitor is described herein. The described invention also includes methods of using the same in the treatment of diseases mediated by inappropriate ret kinase activity.