Patent ID: 7304168

Claim:
A photo-caged fluorophore having the structure: wherein X is O; R 1 is any linear or branched alkyl chains up to 20 carbon atoms or any one of the 20 amino acids either in D or L configuration; R 2 is H, alkyl groups up to 6 carbon atoms, F, Cl, Br, CF 3 , CHF 2 , or CH 2 F; R 3 is H, F, Cl, or Br; R 4 and R 6 are independently H, F, Cl, or Br, but not both F; and R 5 is selected from the group consisting of: wherein R 7 is R 8 is H, CH 3 , or CH 3 CO; and R 9 and R 10 are independently the same or different and are H, linear or branched alkyl chains containing from 1 to 10 carbons, or acetates.