An interesting example towards high‐throughput chemistry was reported by Balakirev and co‐workers, who made use of the Groebke–Blackburn–Bienaymé reaction between heterocyclic amidines, aldehydes, and isocyanides to generate a library of 1600 compounds in droplet arrays (Figure 2 D).9 Subsequent analysis identified fluorophores with emission wavelengths ranging from 485 nm to 627 nm, and selected fluorophores were used to image the mitochondrial benzodiazepine receptor TSPO in PC3 prostate cancer cells, among others. Here, TSPO is linked to prostate carcinoma.