Compounds and compositions for use in phototherapy and in treatment of ocular neovascular disease and cancers

A method for treating cancer, the method comprising:

• administering to a patient in need of treatment an effective amount of a purified (+) enantiomer compound substantially free of a corresponding (−) enantiomer, the (+) enantiomer compound having the formula:
• wherein:
• each of R1 and R2 is independently —H, —CH3, —(O−), C1-C10 alkyl, C3-C10 cycloalkyl, C2-C10 alkenyl, C1-C10 haloalkyl, C5-C10 aryl, C5-C10 heteroaryl, C5-C10 alkylaryl, C5-C10 alkylheteroaryl, C5-C10 carbonylalkenylaryl, or C5-C10 carbonylalkenylheteroaryl;
• and n is 0 or 1, wherein:
• when n is 1, the nitrogen to which R2 is attached has a positive charge and optionally is associated with an anion;
• and
• when n is 0, R2 is not present.

A method for treating cancer, the method comprising:

• administering to a patient in need of treatment an effective amount of a purified (+) enantiomer compound substantially free of a corresponding (−) enantiomer, the (+) enantiomer compound having the formula (FX14):
• wherein:
• each of R1 and R2 is independently —H, —CH3, —(O−), C1-C10 alkyl, C3-C10 cycloalkyl, C2-C10 alkenyl, C1-C10 haloalkyl, C5-C10 aryl, C5-C10 heteroaryl, C5-C10 alkylaryl, C5-C10 alkylheteroaryl, C5-C10 carbonylalkenylaryl, or C5-C10 carbonylalkenylheteroaryl;
• and n is 0 or 1, wherein:
• when n is 1, the nitrogen to which R2 is attached has a positive charge and optionally is associated with an anion;
• and
• when n is 0, R2 is not present.