Coumarins occupy a unique place in the realm of natural and synthetic organic chemicals, which present a wide variety of properties [1]. Members of this group display a broad range of applications as additives to perfumes and cosmetics [2], as photographic sensitizers and solar collectors [3], as fluorescent markers in biochemistry [4], as tuneable dye lasers [5]. Since the 1990's, a large number of in vivo and in vitro studies have revealed a diverse ...
