| abstract |
Heterocyclic aromatic compounds are provided which are useful in stimulating endogenous production or release of growth hormone and in treating obesity, osteoporosis (improving bone density) and in improving muscle mass and muscle strength. n The heterocyclic aromatic compounds have the structure n n nincluding pharmaceutically acceptable salts thereof and all stereoisomers thereof,n n wherein X a is heteroaryl, preferably, n n nand R 1 , R 1a , R 6 , Y, X b , A, B, Z, R 3 , R 4 , R 4a , R 5 and R 5a are as defined herein. |