The invention provides novel prostaglandin analogs. In particular, the
present invention relates to compounds having a structure according to
formula (I) wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6,
W, X, Z, a, b, p and q are defined below. This invention also includes
optical isomers, diastereomers and enantiomers of formula (I), and
pharmaceutically-acceptable salts, biohydrolyzable amides, esters, and
imides thereof. The compounds of the present invention are useful for the
treatment of a variety of diseases and conditions, such as bone disorders
and glaucoma. Accordingly, the invention further provides pharmaceutical
compositions comprising these compounds. The invention still further
provides methods of treatment for bone disorders and glaucoma using these
compounds or the compositions containing them.
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