As for the derivatives from Magydaris pastinacea, also these investigated coumarins/psoralens 51–58 showed no inhibitory action towards the cytosolic hCA I and II isoforms, which is a positive feature, as these are house-keeping enzymes in most cells/tissues, but they were effective, in some cases as low nanomolar inhibitors against the tumour associated isoforms hCA IX and XII; making them of interest for anticancer studies. The gene discussed is CYP24A1; the disease is neoplasm.