Patent ID: 7129272

Claim:
A method for treating photoretinitis in a subject in need thereof, which comprises administering an effective amount of a 15-keto prostaglandin compound represented by the following formula (II): wherein L and M are hydrogen, hydroxy, halogen, lower alkyl, lower alkoxy, hydroxy(lower)alkyl or oxo, wherein at least one of L and M is a group other than hydrogen, and the five-membered ring may have one or more double bond; A is —CH 2 OH, —COCH 2 OH, —COOH or its functional derivative; B is —CH 2 —CH 2 —, —CH═CH— or —C≡C—; X 1 and X 2 are hydrogen, lower alkyl or halogen; R 1 is a divalent saturated or unsaturated lower-medium aliphatic hydrocarbon residue, which is unsubstituted or substituted by halogen, alkyl, hydroxy, oxo, aryl or heterocyclic group; R 2 is a single bond or lower alkylene; and R 3 is lower alkyl, lower alkoxy, cyclo(lower)alkyl, cyclo(lower)alkyloxy, aryl, aryloxy, heterocyclic group or heterocyclic-oxy group to the subject.