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CRANAD probes for detecting ROS: (A) CRANAD-61. (B) CRANAD-5. (C) The design strategy for ROS-sensitive imaging probes, and (D) HOMO/LUMO of CRANAD-2 and CRANAD-61. The energy gap of CRANAD-61 is smaller than that of CRANAD-2 (Reproduced with permission from [14]. Copyright 2017 Published under the PNAS license.).
