Among the obtained products, more than ten compounds are new derivatives, and even for some of the known compounds, the photoswitching properties have not been reported. We were particularly interested in photoswitching properties of indigoids that can be incorporated into biologically relevant derivatives. The new derivatives 5n, 6n, and 7n are of special interest because they are amino acids' derivatives with C-termini available for modifications and therefore can be incorporated as parts of peptides or proteins.