Scented water, odoriferous water or sweet water, is a water with a sweet aromatic smell. It can react with acids to produce the odoriferous hydrogen sulfide gas. They are not as odoriferous as the thiols. These researches incidentally solved the constitution of coumarin, the odoriferous principle of woodruff. Smell is a chemical sense that involves odoriferous molecules as the primary source of information. Usually the objects of interest are odoriferous objects such as plants, flowers and foods. He described it, with its bark "as odoriferous as cinnamon", but did not name it. The flowers are often numerous and highly odoriferous.