With the tight restriction on the much loved violet leaf materials Methyl Octine Carbonate (0.01% of the finished product) and Methyl Heptine Carbonate (0.047% of the finished product), Undecavertol has become vital for the modern perfumer. Undecavertol is a wonderful material for green florals, whether it be violet or lindenblossom. Additionally it has nuances of kiwifruit and muguet. Undecavertol has less power than violet leaves and if using it as a replacer for the aforementioned carbonates, you will need to increase the quantity used. In the words of its manufacturer, Givaudan: “Undecavertol was developed in connection with structural elucidation work on unknown trace components of lily-of-the-valley. It has a powerful green-floral character, somewhat related to lily-of-the-valley, with natural, fresh, fruity violet leaf and linden-blossom aspects. It can be used successfully in rose and fruity pear accords. Although easy to use in most perfumery types, Undecavertol requires careful dosage and blending due to its exceptional strength.” Despite Givaudan's warning on dosing, this material can be wildly overdosed to great effect as evidenced by DKNY's Be Delicious (2004) by Maurice Roucel in which he used 10% pure!