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(a) The chemical structure of EC17 and OTL38; (b) biophysical properties of EC17 and OTL38 including excitation spectra; EC17 peak λ ex 494 nm and OTL38 peak λ ex 774 nm; (c) light intensity measured with Flocam; and (d) the luminometer of serial dilutions of EC17 and OTL38.
