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(A) ESI-MS of product. 17,592 Da expected, 17,592 Da observed. (B) Re-injection of purified 22/9/9 GC TIVA probe on RP-HPLC. (C) Melting curve analysis of 22/9/9 GC while caged (red), photolyzed (blue), or photolyzed and target-bound (green).