| abstract |
The invention provides compounds represented by the formula (I), each of which compounds may have sphingosine-1-phosphate receptor agonist and or antagonist biological activity: wherein: A, m, n, p, a, X, Y and Z are defined in the specification. These compounds are useful for treating a disease or condition selected from the group consisting of glaucoma, dry eye, angiogenesis and pulmonary edema. |