The present invention provides a method of treating 
ocular hypertension or 
glaucoma which comprises administering to an animal having 
ocular hypertension or 
glaucoma therapeutically effective amount of a compound represented by the general formula I; wherein the dashed line indicates the presence or absence of a bond, the hatched wedge indicates the α (down) configuration, and the 
solid triangle indicates the β (up) configuration;B is a single, double, or triple 
covalent bond;n is 0-6;X is CH2, S or O;Y is any pharmaceutically acceptable salt of CO2H, or CO2R, CONR2, NHCH2CH2OH, N(CH2CH2OH)2, CH2OR, P(O)(OR)2, CONRSO2R, SONR2, or R is H, C1-6 
alkyl or C2-6 alkenyl;R2 and R3 are C1-6 linear 
alkyl which may be the same or different, and may be bonded to each other such that they form a ring incorporating the carbon to which they are commonly attached;R4 is 
hydrogen, R, C(═O)R, or any group that is easily removed under physiological conditions such that R4 is effectively 
hydrogen;R5 is 
hydrogen or R;R6 isiv) hydrogen;v) a linear or branched 
hydrocarbon containing between 1 and 8 carbon atoms, which may contain one or more double or triple bonds, or 
oxygen or 
halogen derivatives of said 
hydrocarbon, wherein 1-3 carbon or hydrogen atoms may be substituted by O or a 
halogen; orvi) aryloxy, heteroaryloxy, C3-8 cycloalkyloxy, C3-8 cycloalkyl, C6-10 
aryl or C3-10 heteroaryl, wherein one or more carbons is substituted with N, O, or S; and which may contain one or more substituents selected from the group consisting of 
halogen, trihalomethyl, cyano, nitro, amino, hydroxy, C6-10 
aryl, C3-10 heteroaryl, aryloxy, heteroaryloxy, C1-6 
alkyl, OR, SR, and SO2R.Some of the compounds of the present invention and some of their methods of preparation are also novel an nonobvious.