acylation of indolizines with carboxylicacids was developed using condensation reagents, generally used for peptide coupling. This method allowed for caging a broad range of carboxylicacids with indolizines. The method enabled a facile synthesis of water-soluble caged bioactive carboxylicacids having an intramolecular photosensitizer. The efficient release of carboxylicacids from the synthesized caged